C11111333133313232233133313331333133112111112113313331312111113113121211   >>    C1111133313331323223313331333133313311211111211331333131211111311312121   <<    C11111333133313232233133313331333133112111112113313331312111113113121213   >>      C11111333133313232233133313331333133112111112113313331312111113113121212   >>