fili- fillo filot filtu filur fiori firit firou fitil fitit fitof fitor fitou fitri fitto flirr flirt floor floro floru floto flour flout fluff fluit fluo- fluor flurr flurt foir- folio folli follo foloi fooli footi forio forit forli forro forti forto forur fotui fotur fouro frill friol frito fritt froit froot fruit fruli fruto ftrtt fu-fu fullf fullo furil furio furir furo- furor futur if-- iffou ifill ifrit ifttt iiiii iitti iliff ilift ilio- illit illui ilori iltur ilulu ioooi ioooo iorio iotit iotti irill irori irour irrit itfit itfor itoff itour itout ittoo ittti itu-r itu-t ituri ituro ituru itutu iuliu li-fi lifou lilfu liliu lilli lillo lilou liour liril lirio lirot lirui litir litti litui liuli lo-fi lofoi lofou loilo lolif lolli lollo lolol lolti looft lorio lorri lorut lotio lotof lotor lotru lotti lotto louit louri louro ltifr luiff luiro lulli lulul lurio lutfi lutol lutto lutui luuri offir offit offof offto ofoil ofori ofoto ofour oilit oilof oirot oitti oliff ollio ollur olofi olotu olour ooioo ooooo orfor orful orill oriol orito orolu orout ortoo oruro orutu otoli otolo otori ototo otour ottir ottoi ottur otulu ouir- oullo ouoro ourol outof outro outto ri-fi rillo rioli riolo ro-ro rofor roiot rolfo rollo rooft rotfl roto- rotol rotor rotot rotti rotto roull routt ruffo rufi- rufio rufo- rufol ruili ruiru rulli rullo ruoti rutli rutul ruutu ti-ti tilfi tilli tillo tiout tirit tirli tiro- tiroi tirol tirou tirru tirtl tirur titii titil titli titlo titof titou titti toffo tofit tofol tofor toili toill tolli tollo toloo tolor tolu- tolui toolt torii toril torio torit torri torro torti torto tortu torul toti- toto- totoo touil touit toull touro trill triol trior trit- trito tritt troff troft troil troll trott troul trout truff truit trull truro ttttt tuffi tufit tuili tulfo tulio tulir tulor tulou tului tuori tuotu turio turit turot turri turro turtu turul turut tutli tutor tutti tutto tuuli tuuri tuuru ufofu uifli uiro uitti ullur ultio ululu uluru uluti urour urtlu uruit uruli ururi uruti urutu utili utro- utror uttur uturu ututo uuuuu