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  ><pre
    ><span class="hs-keyword"
      >module</span
      ><span
      > </span
      ><span class="hs-identifier"
      >Classes</span
      ><span
      > </span
      ><span class="hs-keyword"
      >where</span
      ><span
      >
</span
      ><a name="line-2"
      ></a
      ><span
      >
</span
      ><a name="line-3"
      ></a
      ><span
      >
</span
      ><a name="line-4"
      ></a
      ><span class="hs-keyword"
      >class</span
      ><span
      > </span
      ><a name="Foo"
      ><a href="Classes.html#Foo"
	><span class="hs-identifier"
	  >Foo</span
	  ></a
	></a
      ><span
      > </span
      ><a name=""
      ><a href="#"
	><span class="hs-identifier"
	  >a</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-keyword"
      >where</span
      ><span
      >
</span
      ><a name="line-5"
      ></a
      ><span
      >    </span
      ><a name="bar"
      ><a href="Classes.html#bar"
	><span class="hs-identifier"
	  >bar</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >::</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >-&gt;</span
      ><span
      > </span
      ><span class="hs-identifier hs-type"
      >Int</span
      ><span
      >
</span
      ><a name="line-6"
      ></a
      ><span
      >    </span
      ><a name="baz"
      ><a href="Classes.html#baz"
	><span class="hs-identifier"
	  >baz</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >::</span
      ><span
      > </span
      ><span class="hs-identifier hs-type"
      >Int</span
      ><span
      > </span
      ><span class="hs-glyph"
      >-&gt;</span
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span class="hs-special"
      >,</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span class="hs-special"
      >)</span
      ><span
      >
</span
      ><a name="line-7"
      ></a
      ><span
      >
</span
      ><a name="line-8"
      ></a
      ><span class="hs-keyword"
      >instance</span
      ><span
      > </span
      ><a href="Classes.html#Foo"
      ><span class="hs-identifier hs-type"
	>Foo</span
	></a
      ><span
      > </span
      ><span class="hs-identifier hs-type"
      >Int</span
      ><span
      > </span
      ><span class="hs-keyword"
      >where</span
      ><span
      >
</span
      ><a name="line-9"
      ></a
      ><span
      >    </span
      ><a name=""
      ><a href="Classes.html#bar"
	><span class="hs-identifier"
	  >bar</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >id</span
      ><span
      >
</span
      ><a name="line-10"
      ></a
      ><span
      >    </span
      ><a name=""
      ><a href="Classes.html#baz"
	><span class="hs-identifier"
	  >baz</span
	  ></a
	></a
      ><span
      > </span
      ><a name=""
      ><a href="#"
	><span class="hs-identifier"
	  >x</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><a href="#"
      ><span class="hs-identifier hs-var"
	>x</span
	></a
      ><span class="hs-special"
      >,</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-var"
	>x</span
	></a
      ><span class="hs-special"
      >)</span
      ><span
      >
</span
      ><a name="line-11"
      ></a
      ><span
      >
</span
      ><a name="line-12"
      ></a
      ><span class="hs-keyword"
      >instance</span
      ><span
      > </span
      ><a href="Classes.html#Foo"
      ><span class="hs-identifier hs-type"
	>Foo</span
	></a
      ><span
      > </span
      ><span class="hs-special"
      >[</span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span class="hs-special"
      >]</span
      ><span
      > </span
      ><span class="hs-keyword"
      >where</span
      ><span
      >
</span
      ><a name="line-13"
      ></a
      ><span
      >    </span
      ><a name=""
      ><a href="Classes.html#bar"
	><span class="hs-identifier"
	  >bar</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >length</span
      ><span
      >
</span
      ><a name="line-14"
      ></a
      ><span
      >    </span
      ><a name=""
      ><a href="Classes.html#baz"
	><span class="hs-identifier"
	  >baz</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-identifier"
      >_</span
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><span class="hs-special"
      >[</span
      ><span class="hs-special"
      >]</span
      ><span class="hs-special"
      >,</span
      ><span
      > </span
      ><span class="hs-special"
      >[</span
      ><span class="hs-special"
      >]</span
      ><span class="hs-special"
      >)</span
      ><span
      >
</span
      ><a name="line-15"
      ></a
      ><span
      >
</span
      ><a name="line-16"
      ></a
      ><span
      >
</span
      ><a name="line-17"
      ></a
      ><span class="hs-keyword"
      >class</span
      ><span
      > </span
      ><a href="Classes.html#Foo"
      ><span class="hs-identifier hs-type"
	>Foo</span
	></a
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >=&gt;</span
      ><span
      > </span
      ><a name="Foo%27"
      ><a href="Classes.html#Foo%27"
	><span class="hs-identifier"
	  >Foo'</span
	  ></a
	></a
      ><span
      > </span
      ><a name=""
      ><a href="#"
	><span class="hs-identifier"
	  >a</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-keyword"
      >where</span
      ><span
      >
</span
      ><a name="line-18"
      ></a
      ><span
      >    </span
      ><a name="quux"
      ><a href="Classes.html#quux"
	><span class="hs-identifier"
	  >quux</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >::</span
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span class="hs-special"
      >,</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span class="hs-special"
      >)</span
      ><span
      > </span
      ><span class="hs-glyph"
      >-&gt;</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span
      >
</span
      ><a name="line-19"
      ></a
      ><span
      >    </span
      ><a name=""
      ><a href="Classes.html#quux"
	><span class="hs-identifier"
	  >quux</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><a name=""
      ><a href="#"
	><span class="hs-identifier"
	  >x</span
	  ></a
	></a
      ><span class="hs-special"
      >,</span
      ><span
      > </span
      ><a name=""
      ><a href="#"
	><span class="hs-identifier"
	  >y</span
	  ></a
	></a
      ><span class="hs-special"
      >)</span
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><a href="Classes.html#norf"
      ><span class="hs-identifier hs-var"
	>norf</span
	></a
      ><span
      > </span
      ><span class="hs-special"
      >[</span
      ><a href="#"
      ><span class="hs-identifier hs-var"
	>x</span
	></a
      ><span class="hs-special"
      >,</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-var"
	>y</span
	></a
      ><span class="hs-special"
      >]</span
      ><span
      >
</span
      ><a name="line-20"
      ></a
      ><span
      >
</span
      ><a name="line-21"
      ></a
      ><span
      >    </span
      ><a name="norf"
      ><a href="Classes.html#norf"
	><span class="hs-identifier"
	  >norf</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >::</span
      ><span
      > </span
      ><span class="hs-special"
      >[</span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span class="hs-special"
      >]</span
      ><span
      > </span
      ><span class="hs-glyph"
      >-&gt;</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span
      >
</span
      ><a name="line-22"
      ></a
      ><span
      >    </span
      ><a name=""
      ><a href="Classes.html#norf"
	><span class="hs-identifier"
	  >norf</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><a href="Classes.html#quux"
      ><span class="hs-identifier hs-var"
	>quux</span
	></a
      ><span
      > </span
      ><span class="hs-operator hs-var"
      >.</span
      ><span
      > </span
      ><a href="Classes.html#baz"
      ><span class="hs-identifier hs-var"
	>baz</span
	></a
      ><span
      > </span
      ><span class="hs-operator hs-var"
      >.</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >sum</span
      ><span
      > </span
      ><span class="hs-operator hs-var"
      >.</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >map</span
      ><span
      > </span
      ><a href="Classes.html#bar"
      ><span class="hs-identifier hs-var"
	>bar</span
	></a
      ><span
      >
</span
      ><a name="line-23"
      ></a
      ><span
      >
</span
      ><a name="line-24"
      ></a
      ><span class="hs-keyword"
      >instance</span
      ><span
      > </span
      ><a href="Classes.html#Foo%27"
      ><span class="hs-identifier hs-type"
	>Foo'</span
	></a
      ><span
      > </span
      ><span class="hs-identifier hs-type"
      >Int</span
      ><span
      > </span
      ><span class="hs-keyword"
      >where</span
      ><span
      >
</span
      ><a name="line-25"
      ></a
      ><span
      >    </span
      ><a name=""
      ><a href="Classes.html#norf"
	><span class="hs-identifier"
	  >norf</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >sum</span
      ><span
      >
</span
      ><a name="line-26"
      ></a
      ><span
      >
</span
      ><a name="line-27"
      ></a
      ><span class="hs-keyword"
      >instance</span
      ><span
      > </span
      ><a href="Classes.html#Foo%27"
      ><span class="hs-identifier hs-type"
	>Foo'</span
	></a
      ><span
      > </span
      ><span class="hs-special"
      >[</span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span class="hs-special"
      >]</span
      ><span
      > </span
      ><span class="hs-keyword"
      >where</span
      ><span
      >
</span
      ><a name="line-28"
      ></a
      ><span
      >    </span
      ><a name=""
      ><a href="Classes.html#quux"
	><span class="hs-identifier"
	  >quux</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >uncurry</span
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><span class="hs-operator hs-var"
      >++</span
      ><span class="hs-special"
      >)</span
      ><span
      >
</span
      ><a name="line-29"
      ></a
      ><span
      >
</span
      ><a name="line-30"
      ></a
      ><span
      >
</span
      ><a name="line-31"
      ></a
      ><span class="hs-keyword"
      >class</span
      ><span
      > </span
      ><a name="Plugh"
      ><a href="Classes.html#Plugh"
	><span class="hs-identifier"
	  >Plugh</span
	  ></a
	></a
      ><span
      > </span
      ><a name=""
      ><a href="#"
	><span class="hs-identifier"
	  >p</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-keyword"
      >where</span
      ><span
      >
</span
      ><a name="line-32"
      ></a
      ><span
      >    </span
      ><a name="plugh"
      ><a href="Classes.html#plugh"
	><span class="hs-identifier"
	  >plugh</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >::</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>p</span
	></a
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >-&gt;</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>p</span
	></a
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>b</span
	></a
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>b</span
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >-&gt;</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>p</span
	></a
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >-&gt;</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>b</span
	></a
      ><span class="hs-special"
      >)</span
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>b</span
	></a
      ><span
      > </span
      ><span class="hs-glyph"
      >-&gt;</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-type"
	>a</span
	></a
      ><span class="hs-special"
      >)</span
      ><span
      >
</span
      ><a name="line-33"
      ></a
      ><span
      >
</span
      ><a name="line-34"
      ></a
      ><span class="hs-keyword"
      >instance</span
      ><span
      > </span
      ><a href="Classes.html#Plugh"
      ><span class="hs-identifier hs-type"
	>Plugh</span
	></a
      ><span
      > </span
      ><span class="hs-identifier hs-type"
      >Either</span
      ><span
      > </span
      ><span class="hs-keyword"
      >where</span
      ><span
      >
</span
      ><a name="line-35"
      ></a
      ><span
      >    </span
      ><a name=""
      ><a href="Classes.html#plugh"
	><span class="hs-identifier"
	  >plugh</span
	  ></a
	></a
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><span class="hs-identifier hs-var"
      >Left</span
      ><span
      > </span
      ><a name=""
      ><a href="#"
	><span class="hs-identifier"
	  >a</span
	  ></a
	></a
      ><span class="hs-special"
      >)</span
      ><span
      > </span
      ><span class="hs-identifier"
      >_</span
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >Right</span
      ><span
      > </span
      ><span class="hs-operator hs-var"
      >$</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >const</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-var"
	>a</span
	></a
      ><span
      >
</span
      ><a name="line-36"
      ></a
      ><span
      >    </span
      ><span class="hs-identifier"
      >plugh</span
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><span class="hs-identifier hs-var"
      >Right</span
      ><span
      > </span
      ><a name=""
      ><a href="#"
	><span class="hs-identifier"
	  >a</span
	  ></a
	></a
      ><span class="hs-special"
      >)</span
      ><span
      > </span
      ><span class="hs-identifier"
      >_</span
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >Right</span
      ><span
      > </span
      ><span class="hs-operator hs-var"
      >$</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >const</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-var"
	>a</span
	></a
      ><span
      >
</span
      ><a name="line-37"
      ></a
      ><span
      >    </span
      ><span class="hs-identifier"
      >plugh</span
      ><span
      > </span
      ><span class="hs-identifier"
      >_</span
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><span class="hs-identifier hs-var"
      >Left</span
      ><span
      > </span
      ><a name=""
      ><a href="#"
	><span class="hs-identifier"
	  >b</span
	  ></a
	></a
      ><span class="hs-special"
      >)</span
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >Left</span
      ><span
      > </span
      ><span class="hs-operator hs-var"
      >$</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >const</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-var"
	>b</span
	></a
      ><span
      >
</span
      ><a name="line-38"
      ></a
      ><span
      >    </span
      ><span class="hs-identifier"
      >plugh</span
      ><span
      > </span
      ><span class="hs-identifier"
      >_</span
      ><span
      > </span
      ><span class="hs-special"
      >(</span
      ><span class="hs-identifier hs-var"
      >Right</span
      ><span
      > </span
      ><a name=""
      ><a href="#"
	><span class="hs-identifier"
	  >b</span
	  ></a
	></a
      ><span class="hs-special"
      >)</span
      ><span
      > </span
      ><span class="hs-glyph"
      >=</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >Left</span
      ><span
      > </span
      ><span class="hs-operator hs-var"
      >$</span
      ><span
      > </span
      ><span class="hs-identifier hs-var"
      >const</span
      ><span
      > </span
      ><a href="#"
      ><span class="hs-identifier hs-var"
	>b</span
	></a
      ><span
      >
</span
      ><a name="line-39"
      ></a
      ></pre
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>