C131121333133313233213331333133313331333133313133313331311211331323132213121   >>    C13112133313331323321333133313331333133313331313331333131121133132313221312   <<    C131121333133313233213331333133313331333133313133313331311211331323132213123   >>      C131121333133313233213331333133313331333133313133313331311211331323132213122   >>