ffff ffii fiff fifi fifo fiii fiil fili fill filo fipp flii flip floo flop floy flyi fofo foil foli foll folo foly foof fool fopp foyl fyfi fyli iffy ifil ifpo ifyo iiii iiio iioi iioo iiop iipf ilio ill- illi illo illp illy iloo ioii ioio iolo ioof iooi iooo iopl ipil iplo ipop ippf ippo ippy liff lifl lifo liii lili lill lilo lily lio- lip- lipi lipl lipo lipp lipy liyl llll lloo loff lofi loif loli loll lolo loly loof lool loop lopi lopp lpfp lppl lyff lyfy lyif lyly lyo- lyyf off- offo offy oiii oily oiyl olio olli ollo olly olof olyf ooff oofy oolo oooo opii opio opo- oppi oppo oppy oyly pfff pfli piff piip pil- pili pill pilo pily pipi pipo pipp pipy piyo plff plif plio plip ploo plop ploy plpp poff pofi poil poio poli poll polo poly poof pool poop pop- popi popo popp popy poyo ppif ppli pplo pppo pppp pyl- pyli pyll pyo- pypy yiff yili yill ylli yoff yoli yoll yolo yolp yoly yoof yool yoop yopo yopy yoyo ypfl yyff yyyy