C131121333133313233213331333133313331333133313133313112133313331231   >>    C13112133313331323321333133313331333133313331313331311213331333123   <<    C131121333133313233213331333133313331333133313133313112133313331233   >>      C131121333133313233213331333133313331333133313133313112133313331232   >>