a-a a-b aaa aab aag aan aas aau ab- aba abb abg abn abs abu ag- aga agb agg agn ags agu an- ana anb ang ann ans anu as- asa asb asg asn ass asu au- aua aub aug aun aus b-u baa bab bag ban bas bau bba bbb bbg bbn bbs bbu bga bgb bgg bgn bgs bgu bna bnb bng bnn bns bnu bsa bsb bsg bsn bss bsu bua bub bug bun bus buu gaa gab gag gan gas gau gba gbg gbn gbs gbu gga ggb ggg ggn ggs ggu gna gnb gnn gns gnu gsa gsb gsg gsn gss gsu gu- gua gub gug gun gus guu naa nab nag nan nas nau nba nbb nbg nbn nbs nbu nga ngb ngg ngn ngs ngu nna nnb nng nnn nns nnu nsa nsb nsg nsn nss nsu nua nub nug nun nus nuu saa sab sag san sas sau sba sbb sbg sbn sbs sbu sga sgb sgg sgn sgs sgu sna snb sng snn sns snu ss- ssa ssb ssg ssn sss ssu sua sub sug sun sus suu ua- uaa uab uag uan uas uau uba ubb ubg ubn ubs ubu uga ugb ugg ugn ugs ugu un- una unb ung unn uns unu usa usb usg usn uss usu uua uug uun uus uuu