C111123313121111121111331333133313331333132232233131211111333131232211   >>    C11112331312111112111133133313331333133313223223313121111133313123221   <<    C111123313121111121111331333133313331333132232233131211111333131232213   >>      C111123313121111121111331333133313331333132232233131211111333131232212   >>