C11111333133313232233133313331333133313331311211331333133322121   >>    C1111133313331323223313331333133313331333131121133133313332212   <<    C11111333133313232233133313331333133313331311211331333133322123   >>      C11111333133313232233133313331333133313331311211331333133322122   >>