C312312111133131121333133313113313331333133313331333133313331333133313232321211   >>    C31231211113313112133313331311331333133313331333133313331333133313331323232121   <<    C312312111133131121333133313113313331333133313331333133313331333133313232321213   >>      C312312111133131121333133313113313331333133313331333133313331333133313232321212   >>