C11111333133313232233133313331333133313231313131211113313231131   >>    C1111133313331323223313331333133313331323131313121111331323113   <<    C11111333133313232233133313331333133313231313131211113313231133   >>      C11111333133313232233133313331333133313231313131211113313231132   >>