bbb bbg bbk bbn bbo bbs bgb bgg bgk bgn bgo bgs bkb bkg bkk bkn bko bks bnb bng bnk bnn bno bns bob bog bok bon boo bos bsb bsg bsk bsn bso bss gbg gbk gbn gbo gbs ggb ggg ggn ggo ggs gkb gkn gko gks gnb gnn gno gns gob gog gok gon goo gos gsb gsg gsk gsn gso gss kbb kbk kbn kbo kbs kgb kgo kgs kkb kkk kkn kks kn- kng knk knn kno kob kog kok kon koo kos ksb ksg ksk ksn kso kss nbb nbg nbk nbn nbo nbs ngb ngg ngk ngn ngo ngs nkk nkn nko nks nnb nng nnk nnn nno nns no- nob nog nok non noo nos nsb nsg nsk nsn nso nss ob- obb obg obk obn obo obs ogg ogn ogo ogs okb okg okk oko oks on- onb ong onk onn ono ons oo- oob oog ook oon ooo oos os- osb osg osk osn oso oss sbb sbg sbk sbn sbo sbs sgb sgg sgk sgn sgo sgs sk- skb skg skk sko sks snb sng snk snn sno sns sob sog sok son soo sos ss- ssb ssg ssk ssn sso sss