C131121333133313233213331333133313331333133313113313232211211331323111123231   >>    C13112133313331323321333133313331333133313331311331323221121133132311112323   <<    C131121333133313233213331333133313331333133313113313232211211331323111123233   >>      C131121333133313233213331333133313331333133313113313232211211331323111123232   >>