C1111233131211111211113313331333133313232313331333133313331311211212131   >>    C111123313121111121111331333133313331323231333133313331333131121121213   <<    C1111233131211111211113313331333133313232313331333133313331311211212133   >>      C1111233131211111211113313331333133313232313331333133313331311211212132   >>