C312312111112111113121333133313331333133313331333211232313233313232233222221   >>    C31231211111211111312133313331333133313331333133321123231323331323223322222   <<    C312312111112111113121333133313331333133313331333211232313233313232233222223   >>      C312312111112111113121333133313331333133313331333211232313233313232233222222   >>