sub Random_Walk { my ($left, $right, $pal, $i)=("", "", "", 1); my $test=join " ", @ARGV; for (; $i<((length $test)/2)+2; $i++) { $left.="(.)"; $right="(\\$i)".$right; if ($test=~/$left.?$right/) {$pal=$&; next} return $pal; } }