C11111333133313232233133313331333133313231313131211113313331333132223132111   >>    C1111133313331323223313331333133313331323131313121111331333133313222313211   <<    C11111333133313232233133313331333133313231313131211113313331333132223132113   >>      C11111333133313232233133313331333133313231313131211113313331333132223132112   >>