Use of uninitialized value in numeric comparison (<=>) at ./sorttest.pl line 12.
Use of uninitialized value in numeric comparison (<=>) at ./sorttest.pl line 12.
Use of uninitialized value in numeric comparison (<=>) at ./sorttest.pl line 12.
Use of uninitialized value in numeric comparison (<=>) at ./sorttest.pl line 12.
ALPHA:D 20 letters      ABCCEDFFGAACDDEEEEFG
ALPHA:D 20 letters      ABCCEDFGGAACDDDEEEFG
ALPHA:D 20 letters      ABCCEDFFGAACDDDEEEFG
ALPHA:E 24 letters      ABCCEDFFGAACDDDEEEFGAGAD
ALPHA:E 24 letters      ABCCEDFFGAACDDDEEEFGAGAE