C131121333133313233213331333133313331333133313331321123123233231   >>    C13112133313331323321333133313331333133313331333132112312323323   <<    C131121333133313233213331333133313331333133313331321123123233233   >>      C131121333133313233213331333133313331333133313331321123123233232   >>