C312312111133131212111133133313331333133112113313331333132312211111   >>    C31231211113313121211113313331333133313311211331333133313231221111   <<    C312312111133131212111133133313331333133112113313331333132312211113   >>      C312312111133131212111133133313331333133112113313331333132312211112   >>