ffff ffii fiff fifi fifo fiii fiil fili fill filo fixx fixy flii flix floo flox floy flyi fofo foil foix foli foll folo folx foly foof fool foxx foxy foyl fyfi fyli iffy ifil ifyo iiii iiio iioi iioo ilio ill- illi illo illy iloo ilxx ioii ioio iolo ioof iooi iooo ixil ixxi liff lifl lifo lifx liii lili lill lilo lily lio- lixi lixy liyl llll lloo loff lofi loif loix loli loll lolo loly loof lool lox- loxo lxii lxxi lxxx lyff lyfy lyif lyly lyo- lyx- lyyf off- offo offy oiii oily oiyl olio olli ollo olly olof olyf ooff oofy oolo oooo oxi- oxo- oxof oxox oxxo oxy- oxyl oyly x-fi xify xiii xil- xili xill xixi xlii xlix xlox xolo xoxo xoyo xxii xxix xxxi xxxo xxxx xxxy xyl- xylo yiff yili yill ylli yoff yoix yoli yoll yolo yoly yoof yool yoyo yyff yyyy