C11111211113313112113313331333133313331333132313331333133313331311331312121231   >>    C1111121111331311211331333133313331333133313231333133313331333131133131212123   <<    C11111211113313112113313331333133313331333132313331333133313331311331312121233   >>      C11111211113313112113313331333133313331333132313331333133313331311331312121232   >>