Having issues with regex, input file: 
# Title A  2 B

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A and B can vary for any other letter. But each letter is associated with know value. I need to find what letters are presented then add up the values linked to them. Trying:
if ( $_ =~ /^\S\s+\S+\s[\A\b]/)
              {$sum = 2}
elsif ( $_ =~ /^\S\s+\S+\s[\B\b]/)
              {$sum = 2}
# then for next letter

if ( $_ =~ /^\S\s+\S+\s\S\s+[\B\b]/)
               {$sum += 1}

[download]
it works fine in this case, but if i was to change A to B in input, then the sum printed is wrong??

In reply to regex problem by indie_campbell

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