dddd dfrf dfri didi dido didu dif- diff diii din- dini dinn dino dinu dion dior diou dird dirr dod- dodd dodi dodo doff doid doin dond doni donn dono donr dood doof doon door dord dorf dori dorn doro dorr doru doud douf doun dour drif drin drno drod drof dron drou drui druu dudd dudo dudu duff dufu duid duif duin duir dunn duno duo- duon duri durn duro duru duur ffff ffii ffrr ffun fidf fido fiff fifi fifo fiii find fini finn fino fion fior firn fndd fndn fndr fnuf fofo foid foin fond fono food foof foon for- ford fori forn foro forr foud foun four frid frin frio fron frou frun fudd fudi fuff fufu fuid fuir fund funf fuor fur- furi furn furo furr i-no iddo idid idin idio idir idno idon idrf idro idun iduo ifid ifni ifno ifnr ifor ifrf ifri iiii iiio iino iioi iioo ind- indi indo indu infi info inid inni inno innr innu ino- inoi inon inor inou inri inro inui inun iod- iodd iodo ioii ioio ioni ionn iono ioof iooi iooo iori ioun irdo irfu iri- irid irin irio irod iron irri irun iuiu iuno n-ii nddo ndfi ndor ndrf ndri nfff nfon nidd nidi nido niff niir niiu nind nini nino nion nioo niou niro niru niur nnnn nodi nodo nodu nofi noid noif noin noio noir non- noni nonn nono nonu noo- noon nooo noor nor- nord norf nori norn noro norr noun nour nron nrrd nudd nudi nudo nuff nuin nunn nuno nuon nurd nuri nurn nurr nuru oddd oddi odin odio odir odiu odon odoo odor odou odur ofdr off- offo offr offu ofid ofno ofor oido oiii oion ondi ondo onir onni onno onod onon onor onur oodi ooff ooid oooo oord ordn ordo ordu orff orfi orfu ori- orid orif orin orio orni orno oro- orof oron oror orri orro ouff ouii ouin ouir oun- ound our- ourn ouro ouu- rdio rfdi rfid ridd ridi rido riff rifu riif riin rind rinf rinn rino rion riou riri rndf rnin rnod rodd rodi rodo roff rofo roid roif roin roio roir roiu rond roni rono rood roof rooi roon roor rori roro roru roud rouf roun rrif rrrr rrun rudd rudi rudo ruff rufo ruid ruif ruin rund runf runi runn runo rurd ruri ruro ruru ruud ruun uddi udid udin udir udon udoo udun uirr undi undo unfd uni- unif unii unin unio unir unni unno unon unrf unro uofo uor- urdu urff urfi urif urin uriu urni uro- uroo urri urun urur uuni uuno uuri uuuu