dddd ddpo didi dido dif- diff diii dilf dili dill dilo diol diop dipl dipo dipp dlii dlil dod- dodd dodi dodo doff doid doil dold dolf doli doll dolo dolp dood doof dool doop dopo dopp dpll ffff ffii fidf fido fiff fifi fifo fiii fiil fild fili fill filo fipp flid flii flip flod floo flop fofo foid foil fold foli foll folo food foof fool fopp fpdl iddo idfp idid idil idio idli idol ifid ifil ifpo iiii iiio iioi iioo iiop iipf ilio ill- illd illi illo illp iloo iod- iodd iodo ioii ioio iolo ioof iooi iooo iopl ipdi ipid ipil iplo ipod ipop ippf ippo lddp ldif lidl lido liff lifl lifo liii lili lill lilo lio- liod lip- lipi lipl lipo lipp lldp llll llod lloo lodi loff lofi loid loif lold loli loll lolo lood loof lool loop lopi lopp lpfp lpod lppl oddd oddi odio odoo odop off- offo ofid oido oiii olid olio olli ollo olof oodi ooff ooid oold oolo oooo opii opio opo- oppi oppo pfff pfli pido piff piip pil- pild pili pill pilo pipi pipo pipp plff plid plif plio plip plod ploo plop plpp pod- podd podi podo poff pofi poid poil poio pold poli poll polo pood poof pool poop pop- popi popo popp ppid ppif ppli pplo ppod pppd pppo pppp