dddd didi dido didu dif- diff diii dilf dili dill dilo diol diou dlii dlil dod- dodd dodi dodo doff doid doil dold dolf doli doll dolo dolu dood doof dool doud douf doul dudd dudo dudu duff dufu duid duif duil duli dull dulo dulu duo- duul ffff ffii fidf fido fiff fifi fifo fiii fiil fild fili fill filo flid flii flod floo flou flud fluf fluo fofo foid foil fold foli foll folo food foof fool foud foul fudd fudi fuff fufu fuid fuil fuli full fulu iddo idid idil idio idli idol iduo ifid ifil iiii iiio iioi iioo ilio ill- illd illi illo iloo ilud iod- iodd iodo ioii ioio iolo ioof iooi iooo iuiu ldif lidl lido liff lifl lifo liii lili lill lilo lilu lio- liod liuf llll llod lloo llud lodi loff lofi loid loif loiu lold loli loll lolo lood loof lool loud loui loul louu ludd ludi ludo luff lufu luif luli lull lulu oddd oddi odio odiu odoo odou off- offo offu ofid oido oiii olid olio olli ollo olof oodi ooff ooid oold oolo oooo ouff ouii ould oulu ouu- uddi udid udoo ulli ullo ulo- ulul uofl uofo uulu uuuu