-ing gggg ggpo ggrn gigg gigi gign gigo ging gini ginn gino giog gioi gion giop gipi gipp girg giri girn giro girr gnin gnip gnoo gnrr gogi gogo goin goip gon- gong goni gonn gono goog gooi goon goop goor gopi gopo gorg gori gorn goro gorp gorr govi gpgp gpip gprp gpvi grig grin grip grni grog groi gron groo grop gror grov grrr gvvv i-go i-no igni igno igon igoo igor igri iiii iiio iino iioi iioo iiop ingo inig inni inno innr ino- inoi inon inor inp- inpi inpp inri inro ioii ioio ioni ionn iono iooi iooo iorg iori ipin ipop ippo ippr ipri iri- irig irin irio irip iron irop irov irri ivig ivin ivon ivor n-ii ngio ngon ngor ngri nigg nigo niip niir ning nini nino niog nion nioo nipr niro nirv nivo nivr nngn nnnn nnpi nnpr nogg nogo noin noio noir non- nong noni nonn nono noo- noon nooo noop noor noov nor- norg nori norn noro norr norv nov- novi novo npin npiv npov npri nron nrpn nvir nvpi oggi ogin ogni ogog ogoi ogon ogri ogro oigo oiii oion ongi ongo onir onni onno onon onor onpg oooo opii opin opio opng opo- opon opor oppi oppo orgn orgo ori- orig orin orio orni orno oro- oron oror orpi orri orro orvr ovi- ovni ovo- ovon ovoo ovpp pigg pign pigo pigp pigv piip ping pini pinn pino pinp pion pipi pipo pipp pirg piri pirn piro pirr pivo pnin pnon pnpo pnpp pnro pogg pogo poin poio pong poni pono ponp poon poop poor pop- popi popo popp porg pori porn poro porr povo ppgi ppig pppn pppo pppp pri- prig prii prin priv prnp pro- prog pron proo prop prov prri rigg rigi rigo riin ring rinn rino rion ripi ripp ripr riri rivo rivp rnin rnpv rogg rogi rogo roig roin roio roir rong roni rono roog rooi roon roop roor ropo rori roro rovi rovo rpii rpon rppn rrrr vigo vigr viii ving vini vino vion vipr virg viri viro virr vivi vivo vnir voin voio voip voir voni vonn voog voor vor- vori voro vpon vpro vrin vrio vrnn vron vrpn vvog vvvv