C11111211113313112113313331333133313331333132212111133112331211   >>    C1111121111331311211331333133313331333133313221211113311233121   <<    C11111211113313112113313331333133313331333132212111133112331213   >>      C11111211113313112113313331333133313331333132212111133112331212   >>