C1111233131211111211113313331333133313232212111133133313332112323111   >>    C111123313121111121111331333133313331323221211113313331333211232311   <<    C1111233131211111211113313331333133313232212111133133313332112323113   >>      C1111233131211111211113313331333133313232212111133133313332112323112   >>