-ol -up fff ffl ffo ffp ffr ffu flf fll flo flp flr flu fof fol foo fop for fou fpl fpo fpp fpr fpu frf frl fro frp frr fru fuf ful fuo fup fur fuu l-p lff lfl lfo lfp lfr lfu llf lll llo llp llr llu lof lol loo lop lor lou lpf lpl lpo lpp lpr lpu lrf lro lrp lrr lru luf lul luo lup lur luu of- off ofl ofo ofp ofr ofu olf oll olo olp olu oo- oof ool ooo oop oor op- opf opl opo opp opr or- orf orl oro orp orr oru ou- ouf oul ouo oup our p-p pff pfl pfo pfp pfr pfu plf pll plo plp plr plu pof pol poo pop por pou ppf ppl ppo ppp ppr ppu prf prl pro prp prr pru puf pul pup pur puu rff rfl rfo rfp rfr rfu rlf rll rlo rlp rlr rlu rof rol roo rop ror rou rpf rpl rpo rpp rpr rpu rrf rrl rrp rrr rru ruf ruo rup rur ruu uff ufl ufo ufp ufr ufu ulf ull ulo ulp ulr ulu uol uoo uop uor up- upf upo upp upr upu ur- urf url uro urp urr uru uur uuu

ffff ffrr floo flop flor flou fluf fluo flur fofo foll folo folr foof fool fopp for- forl foro forr foul foup four fprf frol frop frou fuff fufu full fulu fuor fur- furl furo furr llll lloo loff loll lolo loof lool loop loor lopp lopu loro loul loup lour louu lpfp lppl lprp lrpu lrrr luff lufu lull lulu lupo lupu luup off- offo offr offu ofor ollo olof olor olur ooff oolo oooo opo- opor oppo orff orfu orlo orlu oro- orof oror orro orup ouff oulu our- ouro ouu- pfff pffr plff ploo plop plou plpp plup plur poff poll polo polu poof pool poop poor pop- popo popp poro porr pouf poul poup pour pplo pppo pppp pprf ppru ppur prlr pro- prof prol proo prop prou pruf pruu puff pull pulo pulp pulu pupl pupu pur- purl puro purp purr puru rffl roff rofl rofo rolf roll rolo rolp roof rool roop roor ropo roro roru rouf roul roup rpof rrrr ruff rufo rull rulo rupp ruro rurp ruru u-rp ullo ullr ulo- ulul uofl uofo uor- uplo upor uppp uppu upup urff uro- urol uroo urpo urup urur uulu uuuu

floop floor floro floru flour fluff fluo- fluor flurr follo forro forur fouro froop froup fu-fu fullf fullo fulop fulup furo- furor l-pop lofou lollo lolol lopou lorup louro lulul lupul lurup offof ofour ofpop ollup ollur olour ooooo oploo oppol orfor orful orlop orolu oruro oullo ouoro ourol pforp ploop plopp plopu pluff plupp po-po pollo pollu polop polur poopo poplr popop poppo popup poro- porro porur pouff poulp proff proll prolo proof proor prop- propl propp propr pull- pullu puppo puro- purul ro-ro rofor rolfo rollo roull rprop ruffo rufo- rufol rullo u-pop ufofu ullur uloop ulpur ululu uluru upfor upoff upolo upolu urour uuuuu

fluor- fluoro foofoo foofur foufou foulup fourof fourou frollo fruupp fullof fullup furfur furour furrfu lloro lo-pro lollop loloru looloo loplop lopoff loulou lourlo lufful lurulu ofpoor oooooo orloff orrour plufur polpol poluru poofup poopoo pop-up popfor popoff popopo poporo poppop populo porful poupou pppppp profor profur propup propur puffup pullup pullur purloo purpur r-loop roflol rollup roloff rouful ruurlo ulloor uppoor upprop uproll uruppu

floorup fluoro- folprof foo-foo foppolo forloff fou-fou foul-up furrour lolpoop loopful looroll off-off ofproof poo-poo poorful pop-off popfoul porullo pull-up pulloff purpour purulo- roll-up rolloff roppolo upfloor

froufrou furfurol lopopolo louploup loupollu oolooloo plopplop poorpoor poroporo pourpour proofful propofol pull-off roll-off roulroul

fllllllll foolproof four-four frou-frou loup-loup puff-puff pulloullo

fool-proof

proof-proof

propuppropup