C11111333133313232233133313331333133313233213331323133313233333112211   >>    C1111133313331323223313331333133313331323321333132313331323333311221   <<    C11111333133313232233133313331333133313233213331323133313233333112213   >>      C11111333133313232233133313331333133313233213331323133313233333112212   >>