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#!/bin/sh
curl https://hackage.haskell.org/package/Chart-1.1/docs/Control-Lens-Operators.html | python -c '
import re, sys
for line in sys.stdin.readlines():
m = re.search(r"""class="def">([^<]+)</a> ::""", line)
if m:
print(m.group(1)[1:-1].replace("&lt;", "<").replace("&amp;", "&").replace("&gt;", ">"))
' | sort | uniq | wc -l
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