C1111233131211111211113313331333133313331333133313331333121111331323123123121   >>    C111123313121111121111331333133313331333133313331333133312111133132312312312   <<    C1111233131211111211113313331333133313331333133313331333121111331323123123123   >>      C1111233131211111211113313331333133313331333133313331333121111331323123123122   >>