C312312111133131212111133133313331323133313233121111331322121112121   >>    C31231211113313121211113313331333132313331323312111133132212111212   <<    C312312111133131212111133133313331323133313233121111331322121112123   >>      C312312111133131212111133133313331323133313233121111331322121112122   >>