C11111333133313232233133313331333133313331312111133133311331311211   >>    C1111133313331323223313331333133313331333131211113313331133131121   <<    C11111333133313232233133313331333133313331312111133133311331311213   >>      C11111333133313232233133313331333133313331312111133133311331311212   >>