C312312111133131212111133131133133313331323223313113313113313231322123231   >>    C31231211113313121211113313113313331333132322331311331311331323132212323   <<    C312312111133131212111133131133133313331323223313113313113313231322123233   >>      C312312111133131212111133131133133313331323223313113313113313231322123232   >>