C1111233131211111211113313331333133313121111133313331333133313331323232233121   >>    C111123313121111121111331333133313331312111113331333133313331333132323223312   <<    C1111233131211111211113313331333133313121111133313331333133313331323232233123   >>      C1111233131211111211113313331333133313121111133313331333133313331323232233122   >>