C11111211113313112113313331333133313331333132212111133133313331121111211   >>    C1111121111331311211331333133313331333133313221211113313331333112111121   <<    C11111211113313112113313331333133313331333132212111133133313331121111213   >>      C11111211113313112113313331333133313331333132212111133133313331121111212   >>