-ing dddd didi didu digg digi diii din- ding dini dinn dint dinu dipn dipp dipt dipu dird dirr dirt diti ditt dntp dntt dnut dpdt dpin dpni dprg drin drip drit drug drui drup drut druu dtdp dtng dttp dudd dudu dugu duid duin duir duit dung dunn dunt durg duri durn durt duru dutp duur duut gdrt gggg ggrn gidd gidi gigg gigi gign ging gini ginn ginu gipi gipp gird girg giri girn girr girt giru giur gnin gnip gnit gnrr gnti gntp gpgp gpip gprd gprp grid grig grin grip grit grni grrr grug grui grun grur grut gtip gudi gudu gugg gugi gugu guid guin gund gung gunn gunt gurd gurg guri gurn gurr gurt guru guti gutt gutu idid idig idin idir idtp idun igni ignu igri iiii iiit iitr iitt ind- indi indu inid inig init inni innr innu inp- inpi inpp inpt inri intd intg inti intn intp intr intu inui inun inup ipdi ipid ipin ippr ipri ipur iput irdp iri- irid irig irin irip irri irti irtp irun itin itri itup itur iuiu iupp n-ii n-up ndnp ndnt ndpd ndpr ndri ndut ngri ngtn ngur nguu nidd nidi nigg nigt niip niir niit niiu nind ning nini nipr nipt nirt niru niti nitr niur nngn nnit nnnn nnpi nnpr nntn npin nppd npri nprt nptn nrpn nrrd ntnd ntnu ntpd ntru nttr ntui nudd nudi nuin nuit nung nunn nunt nurd nuri nurn nurp nurr nurt nuru nutt nutu pdpn pdpr pgdn pgpu pgup pigg pign pigp pigt pigu piip pind ping pini pinn pinp pint pinu pipi pipp pirg piri pirn pirr piru piti pitr pitt pitu pnin pnpp pntd pntr pnup ppgi ppid ppig pppd pppn pppp ppru pptn pptt ppur pri- prid prig prii prin prnd prnp prpd prrd prri prti prtp prtr prud prut pruu ptpd ptrd ptui pudu pugu puid puig puin puir puit puiu pund pung punt punu pupi pupu pur- purg puri purp purr puru put- puti putt putu rgit rgtr ridd ridi rigg rigi rigu riin rind ring rinn ripd ripi ripp ripr ript riri riti ritt ritu rndp rnin rnnt rntd rntp rnut rpdp rpii rppn rptd rptn rrrr rrun rtdt rtnd rttp rudd rudi rudp rugg rugi ruid ruin ruit rund rung runi runn runt rupp rupt rurd ruri rurp ruru ruti rutt rutu ruud ruun tdri tidd tigi tigr tiit tiiu tind ting tini tinn tint tinu tip- tipi tipp tipt tipu tird tiri tirr tiru titi titp titt titu tndd tnut tpdu tpir tppd tppp tppr tptp tptr tput tri- trig trin trip trit trng trpg trpn trpp trtr trud trug trun trut truu tttt tudi tudu tugg tugu tuig tuin tuit tuiu tund tung tuni tunn tunu tupi tupu turd turg turi turn turp turr turt turu tuti tutt tutu u-rp uddi udid udig udin udir udpd udun uggt ugni ugri ugur uguu uint uipi uirr undi ungp ungu uni- unii unin unir unit unni unut upin upnp uppp uppu upri upup urdu urgi urgu urin uriu urni urri urun urup urur urut utid utin utpd utri utti uttu utug uuni uuri uuuu