C131121333133313233213331333133313331333131133133313331312121211   >>    C13112133313331323321333133313331333133313113313331333131212121   <<    C131121333133313233213331333133313331333131133133313331312121213   >>      C131121333133313233213331333133313331333131133133313331312121212   >>