C312312111111331312111133133313231333133313121211113313232233132331111   >>    C31231211111133131211113313331323133313331312121111331323223313233111   <<    C312312111111331312111133133313231333133313121211113313232233132331113   >>      C312312111111331312111133133313231333133313121211113313232233132331112   >>