C131121333133313233213331333133313331333133313331321123123232222311   >>    C13112133313331323321333133313331333133313331333132112312323222231   <<    C131121333133313233213331333133313331333133313331321123123232222313   >>      C131121333133313233213331333133313331333133313331321123123232222312   >>