C312312111111331312111133133313331333133313232233133313331333133313112113121111   >>    C31231211111133131211113313331333133313331323223313331333133313331311211312111   <<    C312312111111331312111133133313331333133313232233133313331333133313112113121113   >>      C312312111111331312111133133313331333133313232233133313331333133313112113121112   >>