C131121333133313233213331333133313331312111133133313331323233121221   >>    C13112133313331323321333133313331333131211113313331333132323312122   <<    C131121333133313233213331333133313331312111133133313331323233121223   >>      C131121333133313233213331333133313331312111133133313331323233121222   >>