ffff ffps ffrr ffss fftf fofo foof foos foot fopp fops for- foro forr fors fort foso foss fost foto fotp fots fott foxx fprf frop fros frot frps frso frst fsfo fspf fssf fssp ftop ftos ftps ftrs ftsr fxsp off- offo offr offs ofor ofst oftp ooff oofs oooo ooos oops oort oost ootp oots opo- opor opos oppo opps opto opts orff orfs oro- orof oror oros orot orps orro orrs orso orto orts osoo osor osos osro osso ostr osts otfp oto- otof otoo otor otos otpp otro otrs otso otto otts oxo- oxof oxos oxox oxxo pfff pffr pfft pfps poff poof poop poor poos poot pop- popo popp pops popt poro porr pors port poso poss post potf poto pots pott ppos pppo pppp ppps pprf ppsf ppss ppts pptt prfs pro- prof proo prop pros prot prox prps prrs prso prss prtp prtr psfs psos pspp pspr psps psrp psso psst psts ptop ptox ptrf roff rofo roof roop roor roos root roox ropo rops roro rort roso rosp ross rost roto rotr rots rott roxo rpof rpos rpps rpts rrrr rrsp rsos rspo rsps rstp rsts rtps rtss rttp rtts s-os sfor sfos sfro sfss sftp sfts sofo soft soof soop soor soos soot sopo sopp sops soro sorr sors sort soso soss sost soto sotp sots soxs spfs spoo spop spor spos spot spox sppf spps spro sprs spso spsp spss spst spto sptr spts sros srps srpt srpx srsp srtp srtr ssfp ssop ssot sspf sspo ssps sspt sspx ssrs sssf ssss sstp ssts stof stoo stop stor stos stot stox stpf stpp stps stro strs stsf stss sttr tfot tfox tfpt tfrs tfss tftp toff tofo toft toof toor toos toot top- topf topo topp tops topt torf toro torp torr tors tort torx toso toss tost tosx toto totr tots tott tox- toxo toxs toxt tppp tppr tprs tptp tptr trfr troo trop tros trot trox trpp trps trst trtr tsop tsos tspo tsps tspt tssf tssr tsst tsts ttff ttop ttss tttt txtr xftp xoro xorp xors xoxo xpot xpto xtro xtsr xxxo xxxx