C131121333133313233213331333133313331312111133133313331333133313232223211   >>    C13112133313331323321333133313331333131211113313331333133313331323222321   <<    C131121333133313233213331333133313331312111133133313331333133313232223213   >>      C131121333133313233213331333133313331312111133133313331333133313232223212   >>