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while( my $word = <STDIN> ){
  chomp $word;
  last if $word eq 'done';
  $counter{$word}++;
}

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for my $word (keys %counter){
  print "You typed $word $counter{$word} time" .($counter{$word}>1 ? '
+s' : ''). ".\n";
  # or
  printf "You typed %s %d time%s.\n", $word, $counter{$word}, ($counte
+r{$word}>1?'s':'');
}