C11111211113313112113313331333133313331333133213331333133312133121   >>    C1111121111331311211331333133313331333133313321333133313331213312   <<    C11111211113313112113313331333133313331333133213331333133312133123   >>      C11111211113313112113313331333133313331333133213331333133312133122   >>