b-u bbb bbg bbk bbn bbo bbs bbu bgb bgg bgk bgn bgo bgs bgu bkb bkg bkk bkn bko bks bnb bng bnk bnn bno bns bnu bob bog bok bon boo bos bou bsb bsg bsk bsn bso bss bsu bub bug buk bun buo bus buu gbg gbk gbn gbo gbs gbu ggb ggg ggn ggo ggs ggu gkb gkn gko gks gnb gnn gno gns gnu gob gog gok gon goo gos gou gsb gsg gsk gsn gso gss gsu gu- gub gug guk gun guo gus guu kbb kbk kbn kbo kbs kbu kgb kgo kgs kgu kkb kkk kkn kks kku kn- kng knk knn kno knu kob kog kok kon koo kos kou ksb ksg ksk ksn kso kss ksu kub kug kuk kun kus kuu nbb nbg nbk nbn nbo nbs nbu ngb ngg ngk ngn ngo ngs ngu nkk nkn nko nks nku nnb nng nnk nnn nno nns nnu no- nob nog nok non noo nos nou nsb nsg nsk nsn nso nss nsu nub nug nuk nun nuo nus nuu ob- obb obg obk obn obo obs obu ogg ogn ogo ogs okb okg okk oko oks oku on- onb ong onk onn ono ons onu oo- oob oog ook oon ooo oos os- osb osg osk osn oso oss osu ou- ouk oun ouo ous sbb sbg sbk sbn sbo sbs sbu sgb sgg sgk sgn sgo sgs sgu sk- skb skg skk sko sks sku snb sng snk snn sno sns snu sob sog sok son soo sos sou ss- ssb ssg ssk ssn sso sss ssu sub sug suk sun suo sus suu ubb ubg ubk ubn ubo ubs ubu ugb ugg ugk ugn ugo ugs ugu ukb ukk ukn uku un- unb ung unk unn uno uns unu uob uog uok uon uoo uos usb usg usk usn uso uss usu uug uun uus uuu