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  1. or download this
    c:\@Work\Perl\monks>perl -wMstrict -le
    "for my $string (qw(
    ...
    '50.10-d557_8' -> '8'
    '50.10-d557_20' -> '20'
    '50.10-d557_123' -> '123'
    
  2. or download this
    c:\@Work\Perl\monks>perl -wMstrict -e
    "use Data::Dump qw(dd);
    ...
    
    ("_", undef, 0)
    '_' parse failed