C31231211113313121211113313331323133313331333133313133313232121211   >>    C3123121111331312121111331333132313331333133313331313331323212121   <<    C31231211113313121211113313331323133313331333133313133313232121213   >>      C31231211113313121211113313331323133313331333133313133313232121212   >>