C312312111133131212111133133313231333132311331333133313233233313232131   >>    C31231211113313121211113313331323133313231133133313331323323331323213   <<    C312312111133131212111133133313231333132311331333133313233233313232133   >>      C312312111133131212111133133313231333132311331333133313233233313232132   >>