C11111333133313232233133313331333133313331312111133133313222121221   >>    C1111133313331323223313331333133313331333131211113313331322212122   <<    C11111333133313232233133313331333133313331312111133133313222121223   >>      C11111333133313232233133313331333133313331312111133133313222121222   >>