dddd dfrf dfri didi dido dif- diff diii diki diko dior dird dirk dirr dkid dod- dodd dodi dodo doff doid doki doko dood doof dook door dord dorf dori dork doro dorr drif drod drof f--k ffff ffii ffrr fidf fido fiff fifi fifo fiii fiki fior firk fofo foid foki food foof fook for- ford fori fork foro forr frid frik frio iddo idid idio idir idrf idro ifid ifor ifrf ifri iiii iiio iioi iioo ikid ikki ikko ikoo ikri iod- iodd iodo ioii ioio ioko ioof iooi iooo iori irdo iri- irid irio irki irod irri k-id kddd kddf kddi kddk kddr kdfi kdfo kdfr kdio kdkd kdkk kdko kdkr kdok kdrf kdri kdro kfff kffk kfio kfir kfok kfoo kfor kfrd kfri kfro kfrr kidd kidi kidk kido kidr kiff kifr kiid kiii kiik kikd kikf kiki kikk kiko kikr kiod kioi kiok kioo kirf kiri kirk kiro kirr kkdd kkdo kkfi kkfr kkid kkik kkkk kkoo kkor kkrf kkrk kkro kkrr kodi kodk kodo koff kofi kofk kofo koii koir kokf koki kokk koko kokr kooi kook kooo koor kord korf kori kork koro korr krdd krdo krdr krfd krff krfo krid krik krio krkd krki krkk krko krkr krod krof kroi krok kroo kror krrf krri krrk krro krrr oddd oddi odio odir odoo odor ofdr off- offo offr ofid ofik ofor oido oiii oiko okir okko okok okor okro oodi ooff ooid oooo oord ordo orff orfi ori- orid orif orio orko oro- orof orok oror orri orro rdio rfdi rfid ridd ridi rido riff riif riki rikk riri rkkf rodd rodi rodo roff rofo roid roif roik roio roir roki rokk roko rokr rood roof rooi rook roor rori rork roro rrif rrrr