C11111333133313232233133313331333131121133131133133313332212312121   >>    C1111133313331323223313331333133313112113313113313331333221231212   <<    C11111333133313232233133313331333131121133131133133313332212312123   >>      C11111333133313232233133313331333131121133131133133313332212312122   >>