C11111211113313112113313331333133313331333132313331333133313331213311221   >>    C1111121111331311211331333133313331333133313231333133313331333121331122   <<    C11111211113313112113313331333133313331333132313331333133313331213311223   >>      C11111211113313112113313331333133313331333132313331333133313331213311222   >>