C131121333133313233213331333133313331333133313133313331333233222311   >>    C13112133313331323321333133313331333133313331313331333133323322231   <<    C131121333133313233213331333133313331333133313133313331333233222313   >>      C131121333133313233213331333133313331333133313133313331333233222312   >>