b-u bbb bbg bbn bbs bbu bgb bgg bgn bgs bgu bnb bng bnn bns bnu bsb bsg bsn bss bsu bub bug bun bus buu gbg gbn gbs gbu ggb ggg ggn ggs ggu gnb gnn gns gnu gsb gsg gsn gss gsu gu- gub gug gun gus guu nbb nbg nbn nbs nbu ngb ngg ngn ngs ngu nnb nng nnn nns nnu nsb nsg nsn nss nsu nub nug nun nus nuu sbb sbg sbn sbs sbu sgb sgg sgn sgs sgu snb sng snn sns snu ss- ssb ssg ssn sss ssu sub sug sun sus suu ubb ubg ubn ubs ubu ugb ugg ugn ugs ugu un- unb ung unn uns unu usb usg usn uss usu uug uun uus uuu