mmmm mmms mmor mmpr mmrp momo moms moop moor moos mopp mops moro mors moso moss mppp mpps mpro mprp mrps msmm msms msop msor mspp msrp mssm mssp mssr omo- omoo omor omps omro ooms oooo ooos oops opms opo- opor opos oppo opps opsm ormo oro- orom oror oros orps orro orrs orso osm- osmo osoo osor osos ospm osro osso pmmp pmos pmpm pmpo pmrs pomo pomp poms poop poor poos pop- popo popp pops poro porr pors poso poss ppms ppos pppo pppp ppps pprm ppss pro- prom proo prop pros prps prrm prrs prso prss psos pspp pspr psps psrp pssm psso rmrp rmsp romm romo romp roms room roop roor roos ropo rops roro roso rosp ross rpms rpos rpps rrmp rrrr rrsp rsos rspo rsps s-os smos smps smsp smss somm somo soom soop soor soos sopo sopp sops sorm soro sorr sors soso soss spms spoo spop spor spos spps sprm spro sprs spso spsp spss sros srps srsp ssop sspo ssps ssrm ssrs sssm ssss