#!perl -p\x0d $r=a x$_;$a=1;$b=50;0while$r=~s/(^|a{$b})a(\1a?|$)/$1 $a$2/?$a++:--$b;s/$/:$r/;s/a/ _/g
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
download
return to the top page