Using a hash reference in a regular expression

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# Disambiguate.pm
#
...
}

1;

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# Turn on strictures and warnings. Get the module to sort
# out ambiguous answers.
...
    }
}
print "     \n";

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Compiled regular expression is

...
Choose from following, partial unambiguous entry OK
   alias allow appear apply begin clean clear clone close compare
Please choose (or Ctrl-D to exit) ? ^D

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