BrowserUk's regex is easily modified to provide overlapping matches: 

>perl -wMstrict -le
"my $s = 'aaabacadaabbbccccd';
 print qq{'$1'} while $s =~ m[ (?= ((.) (?! \2) . ) ) ]xmsg;;
"
'ab'
'ba'
'ac'
'ca'
'ad'
'da'
'ab'
'bc'
'cd'

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In reply to Re^3: Anything else is fine! by AnomalousMonk
in thread Anything else is fine! by Anonymous Monk

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