ffff ffrr ffss fftf fmsr fmss fofo fomo fomt foof foom foos foot for- form foro forr fors fort foso foss fost fotm foto fots fott from fros frot frsm frso frst fsfo fssf ftos ftrs ftsr mfor mfrs mftf mmff mmmm mmms mmor mmrf mmst mmts moff mofo momo moms moor moos moot morf moro mors mort moso moss most motm moto mots mott mrtm mrts mrtt msff msfs msft msmm msms msor msrt mssf mssm mssr msst mstr msts mtff mtom mtor mtrr mtss mtst mttr mtts off- offo offr offs ofor ofst omo- omoo omor omro ooff oofs ooms oooo ooos oort oost oots orff orfs ormo oro- orof orom oror oros orot orro orrs orso orto orts osm- osmo osoo osor osos osro osso ostr osts oto- otof otoo otor otos otro otrs otso otto otts rmst roff rofo romm romo roms roof room roor roos root roro rort roso ross rost roto rotr rots rott rrrr rsos rsts rtfm rtms rtss rtts s-os sfmm sfor sfos sfro sfss sfts smof smos smot smrf smrt smss sofo soft somm somo soof soom soor soos soot sorm soro sorr sors sort soso soss sost sotm soto sots sros srtr ssot ssrm ssrs sssf sssm ssss ssts stms stmt stof stom stoo stor stos stot stro strs stsf stsm stss sttr t-mo tfot tfrs tfss tmos tmro tmtt toff tofo toft tomm tomo toms tomt toof toom toor toos toot torf torm toro torr tors tort toso toss tost totm toto totr tots tott trfm trfr trms trom troo tros trot trst trtr tsfm tsom tsos tssf tssm tssr tsst tstm tsts ttff ttms ttss tttt