C312312111133131212111133133313231333133313331333133322331312121   >>    C31231211113313121211113313331323133313331333133313332233131212   <<    C312312111133131212111133133313231333133313331333133322331312123   >>      C312312111133131212111133133313231333133313331333133322331312122   >>