C131121333133313233213331333133313331333133313331311221123122111   >>    C13112133313331323321333133313331333133313331333131122112312211   <<    C131121333133313233213331333133313331333133313331311221123122113   >>      C131121333133313233213331333133313331333133313331311221123122112   >>