C312312111133113313231333133313331333133313331333133313113313331323123121   >>    C31231211113311331323133313331333133313331333133313331311331333132312312   <<    C312312111133113313231333133313331333133313331333133313113313331323123123   >>      C312312111133113313231333133313331333133313331333133313113313331323123122   >>