C131121333133313233213331333133313331333133313223313221232233231   >>    C13112133313331323321333133313331333133313331322331322123223323   <<    C131121333133313233213331333133313331333133313223313221232233233   >>      C131121333133313233213331333133313331333133313223313221232233232   >>