C11111333133313232233133313331333133313231313131211113311212311   >>    C1111133313331323223313331333133313331323131313121111331121231   <<    C11111333133313232233133313331333133313231313131211113311212313   >>      C11111333133313232233133313331333133313231313131211113311212312   >>