C131121333133313233213331333133313331312111133133313331121123311   >>    C13112133313331323321333133313331333131211113313331333112112331   <<    C131121333133313233213331333133313331312111133133313331121123313   >>      C131121333133313233213331333133313331312111133133313331121123312   >>