bbbb bbpr bmop bmpt bobb bobo bomb bomp bomt boob boom boop boor boot bopp bor- borm boro borr bort botb boto bott bpot brob brom broo bror brot brrm brrr btbp btob btor btrt bttb mmmm mmor mmpr mmrp mobb mobo momo moob moop moor moot mopp morb moro mort motb motm moto mott mppp mpro mprp mptp mrbb mrbm mrtm mrtt mtbo mtom mtor mtrr mttr obbo obor obot obro ombo omo- omoo omor ompt omro oooo oort ootb ootp opo- opor oppo opto orbb orbo ormo oro- orom oror orot orro orto oto- otoo otor otpp otro otto pbmr pmbr pmmp pmpm pmpo pmrt pobo pomo pomp poop poor poot pop- popo popp popt porb poro porr port poto pott pppo pppp pprm pptt pro- prob prom proo prop prot prrm prtm prtp prtr ptmp ptop rbbb rbbr rmrp rob- robb robo robt romb romm romo romp roob room roop roor root ropo roro rort roto rotr rott rpob rrmp rrrr rtmp rttp t-mo tbrb tbtp tmbr tmro tmtt tobo tobt tomb tomm tomo tomp tomt toom toor toot top- topo topp topt torm toro torp torr tort totm toto totr tott tpmt tppp tppr tptp tptr trmb trom troo trop trot trpm trpp trtr ttbb ttop tttt