bbbb bboy bbpr bbyo bobb bobo boby boob boop boor boot bopp bor- boro borr bort bory botb boto bott boty boyo bpot brob broo bror brot brrr bry- bryo btbp btob btor btrt btry bttb byob byop byrt obbo obby obor obot oboy obro ooby oooo oort oory ootb ootp ooty opo- opor oppo oppy opry opto orbb orbo orby oro- oror orot oroy orro orry orto oto- otoo otor otoy otpp otro otry otto otyr pobo poop poor poot pop- popo popp popt popy porb poro porr port pory poto pott poty poyo poyr pppo pppp pptt pro- prob proo prop prot prtp prtr ptop pyo- pyot pypy pyr- pyro pyry pytt rbbb rbbr rob- robb robo robt roby roob roop roor root ropo ropy roro rort rory roto rotr rott roty royt rpob rrrr rttp rybp ryob ryot rytt ryyt tbrb tbtp to-y tobo tobt toby toor toot top- topo topp topt toro torp torr tort tory toto totr tott toty toyb toyo toyt tppp tppr tptp tptr tpyo troo trop trot troy trpp trtr try- tryb tryo tryp ttbb ttop ttoy tttt tybo typ- typo typp typy tyr- tyro tyrr tyto tytt tyty ybor ybry yobo yoop yoot yopo yopy yoro yort yory yott yoyo yyyy