V3/usr/man/man1/hyphen.1

Find at most related files.
including files from this version of Unix. 
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NAME		hyphen -- find hyphenated words
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SYNOPSIS	hyphen______ file\d1\u ...
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DESCRIPTION	It finds all of the words in a
document which are hyphenated across lines
and prints them back at you in a convenient format.

If no arguments are given, the standard output
is used.
Thus hyphen______ may be used as a filter.
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FILES		--
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SEE ALSO	--
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DIAGNOSTICS	yes
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BUGS		yes, it gets confused, but with no ill effects other than
spurious extra output.