C131121333133313233213331333133313331312111133133313232212133121   >>    C13112133313331323321333133313331333131211113313331323221213312   <<    C131121333133313233213331333133313331312111133133313232212133123   >>      C131121333133313233213331333133313331312111133133313232212133122   >>