omoo omor omre omri omro one- oneb onee oneg onei oneo oner onge ongi ongo onie onir onme onne onni onno onon onor oobe oobi ooer ooff oome oone oooo oore orbb orbe orbi orbo ore- oreb oreg orem oren oreo orer orfe orff orfi orge orgn orgo ori- orie orif orig orin orio orme ormn ormo orne orni orno oro- oroe orof orom oron oror orri orro rbbb rbbr rebb rebe rebo reeb reef reem reen refe reff refg refi refn refr rege regi regm regn rego regr reif reii reim rein reir reme remi remn remo rene reng reni renn reno reof reog rere rerg reri rero rfef rfem rgbe rgbi rib- ribe ribo rief riem rien rier rife riff rige rigg rigi rigo riif riin rime rimi rimm rimo rine rinf ring rinn rino riom rion rire riri rmif rmon rmrg rnbr rnie rnin rob- robb robe robi robo roeg roen roer rofe roff rofo roge rogg rogi rogo roif roig roin roio roir romb rome romi romm romo rone rong roni rono roob roof roog rooi room roon roor rore rori roro rrif rrrr