C131121333133313233213331333133313331333133313133313331322232221   >>    C13112133313331323321333133313331333133313331313331333132223222   <<    C131121333133313233213331333133313331333133313133313331322232223   >>      C131121333133313233213331333133313331333133313133313331322232222   >>