llll lloo llps loll lolo lols lool loop loos loot lopp lops loso losp loss lost lotl loto lots lott lppl lpss lspl lsso lssp lsts ltps ltsp ollo olos olot olst oolo oooo ooos oops oost ootp oots opls opo- opos oppo opps opto opts oslo osoo osos osso osts oto- otoo otos otpp otso otto otts ploo plop plos plot plpp plss pltt poll polo pols polt pool poop poos poot pop- popo popp pops popt poso poss post poto pots pott pplo ppos pppo pppp ppps ppss ppts pptt psol psos pspp psps psso psst psts ptol ptop s-os sllp sloo slop slos slot slpp slps slst slts soll solo solp sols solt sool soop soos soot sopo sopp sops soso soss sost sotl soto sotp sots splo splp spls spoo spop spos spot spps spso spsp spss spst spto spts sslp sslt ssop ssot sspl sspo ssps sspt ssss sstl sstp ssts stlo stlt stol stoo stop stos stot stpp stps stss tlos tol- toll tolo tolt tool toos toot top- topo topp tops topt toso toss tost toto tots tott tpls tpol tppp tptp tsol tsop tsos tspo tsps tspt tsst tsts ttop ttss tttt