C131121333133313233213331333133313331333133313231333131122331211111212131   >>    C13112133313331323321333133313331333133313331323133313112233121111121213   <<    C131121333133313233213331333133313331333133313231333131122331211111212133   >>      C131121333133313233213331333133313331333133313231333131122331211111212132   >>