C11111333133313232233133313331333133313231313131211113313232131211   >>    C1111133313331323223313331333133313331323131313121111331323213121   <<    C11111333133313232233133313331333133313231313131211113313232131213   >>      C11111333133313232233133313331333133313231313131211113313232131212   >>