C31231211111133131211113313331333133313331323133313232233132311211   >>    C3123121111113313121111331333133313331333132313331323223313231121   <<    C31231211111133131211113313331333133313331323133313232233132311213   >>      C31231211111133131211113313331333133313331323133313232233132311212   >>