Solution by Ruben Westerberg
ch-1.pl and ch-1.p6
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Run the program to find months with 5 weekends
ch-2.pl and ch-2.p6
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Example usage
perl5 version:
./ch-2.pl -c 20 < input.txt
perl6 version
./ch-2.p6 --col==20 < inputs.txt
If -c or --col are not specifed a default width of 80 is used