bbbb bbbs bnor bnrr bnss bobb bobo bobs bonn bono bons boob boon boor boos bor- born boro borr bors bosn boso boss brno brns brob bron broo bror bros brrr brrs brsb brsr bsns bson bsos nbbo nnnn nnos nnss nobo nobs non- nonn nono nons noo- noob noon nooo noor noos nor- norb norn noro norr nors nos- noss nron nsbo nsnr nsos nssb nsso nssr nsss obbo obon obor obos obro obsn obsr obss onno onon onor onos onso oons oooo ooos orbb orbo orbs orno orns oro- oron oror oros orro orrs orso osno osnr osoo osor osos osro ossb osso rbbb rbbr rbbs rbss rnbr rob- robb robo robs rono rons roob roon roor roos roro roso ross rrrr rsnn rsno rsnr rsos s-os sbbs sbor snns snob snoo snor snos snrs sobo sobr sobs son- sono sons soon soor soos sorb sorn soro sorr sors soso soss srnn srno sros ssbn ssbr ssns ssrs sssb ssss