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  1. or download this
    use strict;
#use warnings;  #printing lots of undefs
...
1w1w
1w2r
2r1c
  2. or download this
    Enter your test strings:
        Testing '1c':
...
        Testing '2r1c':
Capturing \d+ only:             1='1', 2='', 3='2'
Capturing \d+ plus the letter:  1='1c', 2='', 3='2r'