bbbb bbbs bbpr bnor bnpp bnrr bnss bobb bobo bobs bonn bono bons boob boon boop boor boos bopp bops bor- born boro borr bors bosn boso boss brno brns brob bron broo bror bros brrr brrs brsb brsr bsns bson bsos bspp bspr nbbo nbpp nbps nbsp nnnn nnos nnpr nnss nobo nobs non- nonn nono nons noo- noob noon nooo noop noor noos nops nor- norb norn noro norr nors nos- noss npss nron nrpn nrps nrsp nsbo nsnr nsos nsps nssb nsso nssp nssr nsss obbo obon obor obos obro obsn obsr obss onno onon onor onos onso oons oooo ooos oops opo- opon opor opos oppo opps orbb orbo orbs orno orns oro- oron oror oros orps orro orrs orso osbp osno osnr osoo osor osos osro ossb osso pbrs pbsp pnon pnpo pnpp pnro pobo pobs pono ponp pons poon poop poor poos pop- popo popp pops porb porn poro porr pors posb posn poso poss ppos pppn pppo pppp ppps ppss prbs prnp pro- prob pron proo prop pros prps prrs prso prss psbr psnr pson psos pspp pspr psps psrp psso rbbb rbbr rbbs rbsp rbss rnbr rnsp rob- robb robo robs rono rons roob roon roop roor roos ropo rops roro roso rosp ross rpob rpon rpos rppn rpps rrrr rrsp rsnn rsno rsnr rsos rspb rspo rsps s-os sbbs sbor sbsp snns snob snoo snop snor snos snpo snpp snrs sobo sobp sobr sobs son- sono sons soon soop soor soos sopo sopp sops sorb sorn soro sorr sors soso soss spns spon spoo spop spor spos spps spro sprs spso spsp spss srnn srno sros srps srsp ssbn ssbr ssns ssop sspo ssps ssrs sssb ssss