C11111333133313232233133313331333133313331312111133133313112211211   >>    C1111133313331323223313331333133313331333131211113313331311221121   <<    C11111333133313232233133313331333133313331312111133133313112211213   >>      C11111333133313232233133313331333133313331312111133133313112211212   >>