C111123313121111121111331333133313331323232133313331333132233132213223211121   >>    C11112331312111112111133133313331333132323213331333133313223313221322321112   <<    C111123313121111121111331333133313331323232133313331333132233132213223211123   >>      C111123313121111121111331333133313331323232133313331333132233132213223211122   >>