C312312111133131212111133133313231333132311331333133313223313233313121121   >>    C31231211113313121211113313331323133313231133133313331322331323331312112   <<    C312312111133131212111133133313231333132311331333133313223313233313121123   >>      C312312111133131212111133133313231333132311331333133313223313233313121122   >>