ffff ffps ffss fftf floo flop flos flot flts fofo foll folo fols folt foof fool foos foot fopp fops foso foss fost foto fotp fots fott fsfo fspf fssf fssp ft-l ftop ftos ftps lftp lfts llll lloo llps loff loft loll lolo lols loof lool loop loos loot lopp lops loso losp loss lost lotl loto lots lott lpfp lpft lppl lpss lsof lspl lsso lssp lsts ltps ltsp off- offo offs ofst oftp olfs ollo olof olos olot olst ooff oofs oolo oooo ooos oops oost ootp oots opls opo- opos oppo opps opto opts oslo osoo osos osso osts otfp oto- otof otoo otos otpp otso otto otts pfff pfft pfps plff ploo plop plos plot plpp plss pltf pltt poff poll polo pols polt poof pool poop poos poot pop- popo popp pops popt poso poss post potf poto pots pott pplo ppos pppo pppp ppps ppsf ppss ppts pptt psfs psol psos pspp psps psso psst psts ptol ptop s-os sfls sfos sfss sftp sfts slft sllp sloo slop slos slot slpp slps slst slts sofo soft solf soll solo solp sols solt soof sool soop soos soot sopo sopp sops soso soss sost sotl soto sotp sots spfs splo splp spls spoo spop spos spot sppf spps spso spsp spss spst spto spts ssfl ssfp sslp sslt ssop ssot sspf sspl sspo ssps sspt sssf ssss sstl sstp ssts stlo stlt stof stol stoo stop stos stot stpf stpp stps stsf stss tfot tfpt tfss tftp tlos toff tofo toft tol- toll tolo tolt toof tool toos toot top- topf topo topp tops topt toso toss tost toto tots tott tpls tpol tppp tptp tsfl tsol tsop tsos tspo tsps tspt tssf tsst tsts ttff ttop ttss tttt