a-a a-b aaa aab aag aam aan aar aau ab- aba abb abg abm abn abr abu ag- aga agb agg agm agn agr agu ama amb amg amm amn amr amu an- ana anb ang anm ann anr anu ar- ara arb arg arm arn arr aru au- aua aub aug aum aun aur b-u baa bab bag bam ban bar bau bba bbb bbg bbm bbn bbr bbu bga bgb bgg bgm bgn bgr bgu bma bmb bmg bmm bmn bmr bmu bna bnb bng bnn bnr bnu bra brb brg brm brn brr bru bua bub bug bum bun bur buu gaa gab gag gam gan gar gau gba gbg gbm gbn gbr gbu gga ggb ggg ggm ggn ggr ggu gma gmb gmg gmm gmn gmr gna gnb gnm gnn gnr gnu gra grb grg grm grn grr gru gu- gua gub gug gum gun gur guu m-r maa mab mag mam man mar mau mba mbb mbg mbm mbr mbu mga mgb mgm mgn mgr mgu mma mmb mmg mmm mmn mmr mmu mna mnb mng mnm mnn mnr mnu mra mrb mrg mrm mrn mrr mru mua mub mug mum mun mur muu naa nab nag nam nan nar nau nba nbb nbg nbm nbn nbr nbu nga ngb ngg ngm ngn ngu nma nmb nmg nmm nmn nmr nmu nna nnb nng nnm nnn nnu nra nrb nrg nrm nrn nrr nru nua nub nug num nun nur nuu ra- raa rab rag ram ran rar rau rba rbb rbg rbm rbn rbr rbu rga rgb rgg rgn rgr rma rmb rmg rmm rmn rmr rna rnb rng rnm rnn rnr rnu rra rrb rrg rrm rrn rrr rru rua rub rug rum run rur ruu ua- uaa uab uag uam uan uar uau uba ubb ubg ubn ubr ubu uga ugb ugg ugm ugn ugr ugu um- uma umb umg umm umn umr umu un- una unb ung unm unn unr unu ur- ura urb urg urm urn urr uru uua uug uum uun uur uuu