C131121333133313233213331333133313331333133313331333132231133131133121   >>    C13112133313331323321333133313331333133313331333133313223113313113312   <<    C131121333133313233213331333133313331333133313331333132231133131133123   >>      C131121333133313233213331333133313331333133313331333132231133131133122   >>