oro- orof oron oror orri orro rccc rcdc rcfc rcgc rcic rcid rcnl rcnr rcon rcrd rcrg rdio rdoc rfdi rffc rffl rfic rfid ricc rico ridc ridd ridi rido riff rigg rigi rigo riif riin rill rilo rind rinf ring rinn rino riol rion riri rlcg rlif rlin rnco rndc rndf rnin rnld rnli rnod rocc roco rodd rodi rodo rofc roff rofl rofo rogg rogi rogo roid roif roig roil roin roio roir rold rolf roll rolo ronc rond rong roni rono rood roof roog rooi rool roon roor rorc rori roro rrfc rrif rrrr