C312312111111331312111133133313331333133313232233133313331333133313221323112121   >>    C31231211111133131211113313331333133313331323223313331333133313331322132311212   <<    C312312111111331312111133133313331333133313232233133313331333133313221323112123   >>      C312312111111331312111133133313331333133313232233133313331333133313221323112122   >>