C11111333133313232233133313331333131133132233133313221121131211   >>    C1111133313331323223313331333133313113313223313331322112113121   <<    C11111333133313232233133313331333131133132233133313221121131213   >>      C11111333133313232233133313331333131133132233133313221121131212   >>