C31231211111133131211113313331333133313331323133313232233133311231   >>    C3123121111113313121111331333133313331333132313331323223313331123   <<    C31231211111133131211113313331333133313331323133313232233133311233   >>      C31231211111133131211113313331333133313331323133313232233133311232   >>