C1111233131211111211113313331333133313331333133313331333133313332212233121   >>    C111123313121111121111331333133313331333133313331333133313331333221223312   <<    C1111233131211111211113313331333133313331333133313331333133313332212233123   >>      C1111233131211111211113313331333133313331333133313331333133313332212233122   >>