C312312111133131212111133133313331323133313233121111331311331333133313232211331   >>    C31231211113313121211113313331333132313331323312111133131133133313331323221133   <<    C312312111133131212111133133313331323133313233121111331311331333133313232211333   >>      C312312111133131212111133133313331323133313233121111331311331333133313232211332   >>