C131121333133313233213331333133313331333133313113313331322331312232131231211   >>    C13112133313331323321333133313331333133313331311331333132233131223213123121   <<    C131121333133313233213331333133313331333133313113313331322331312232131231213   >>      C131121333133313233213331333133313331333133313113313331322331312232131231212   >>