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$ cat test_input.txt
Hello, world!
...
Forecastle = 'fo'c'sle' or 'fo'c's'le'
Don't hide the Very pistol; it could be very important.
Why exclude different but include same?

#!/usr/bin/env perl

...

    return $stops;
}

$ cat test_output.csv
1tab    1
...
sure    1
very    2
world   3