llll lloo llps loll lolo lols lool loop loor loos loot lopp lops loro lors loso losp loss lost lotl loto lotr lots lott lppl lprp lpss lrps lrrr lrst lrts ls-r lspl lspr lsso lssp lssr lsts ltps ltrs ltsp ltsr lttr ollo olor olos olot olst oolo oooo ooos oops oort oost ootp oots opls opo- opor opos oppo opps opto opts orlo oro- oror oros orot orps orro orrs orso orto orts oslo osoo osor osos osro osso ostr osts oto- otoo otor otos otpp otro otrs otso otto otts ploo plop plos plot plpp plss pltt poll polo pols polt pool poop poor poos poot pop- popo popp pops popt poro porr pors port poso poss post poto pots pott pplo ppos pppo pppp ppps ppss ppts pptt prlr prls pro- prol proo prop pros prot prps prrs prsl prso prss prtp prtr psol psos pspp pspr psps psrp psso psst psts ptol ptop rlls roll rolo rolp rolt rool roop roor roos root ropo rops roro rort roso rosp ross rost rotl roto rotr rots rott rpls rpos rpps rpts rrrr rrsp rslp rsos rspo rsps rssl rstp rsts rtls rtlt rtps rtss rttp rtts s-os sllp sloo slop slos slot slpp slps slrp slrs slst slts soll solo solp solr sols solt sool soop soor soos soot sopo sopp sops soro sorr sors sort soso soss sost sotl soto sotp sots splo splp splr spls spoo spop spor spos spot spps spro sprs spso spsp spss spst spto sptr spts sros srps srpt srsp srtp srtr sslp sslt ssop ssot sspl sspo ssps sspt ssrl ssrs ssss sstl sstp ssts stlo stlt stol stoo stop stor stos stot stpp stps stro strs stss sttr tlos tlrs tol- toll tolo tolt tool toor toos toot top- topo topp tops topt toro torp torr tors tort toso toss tost toto totr tots tott tpls tpol tppp tppr tprs tptp tptr troo trop tros trot trpp trps trst trtr tsol tsop tsos tspo tsps tspt tssr tsst tsts ttop ttss tttt