C131121333133313233213331333133313331312111133133313232212323231   >>    C13112133313331323321333133313331333131211113313331323221232323   <<    C131121333133313233213331333133313331312111133133313232212323233   >>      C131121333133313233213331333133313331312111133133313232212323232   >>