C1111233131211111211113313331333133313232313331333133322131121132233121   >>    C111123313121111121111331333133313331323231333133313332213112113223312   <<    C1111233131211111211113313331333133313232313331333133322131121132233123   >>      C1111233131211111211113313331333133313232313331333133322131121132233122   >>