C312312111133131212111133133313331333133112113313331333221323223121   >>    C31231211113313121211113313331333133313311211331333133322132322312   <<    C312312111133131212111133133313331333133112113313331333221323223123   >>      C312312111133131212111133133313331333133112113313331333221323223122   >>