C1111233131211111211113313331333133313232321333133313331333231333132311121   >>    C111123313121111121111331333133313331323232133313331333133323133313231112   <<    C1111233131211111211113313331333133313232321333133313331333231333132311123   >>      C1111233131211111211113313331333133313232321333133313331333231333132311122   >>