a-a a-b aaa aab aad aam aan aau ab- aba abb abd abm abn abu ad- ada adb add adm adn adu ama amb amd amm amn amu an- ana anb and anm ann anu au- aua aub aud aum aun b-u baa bab bad bam ban bau bba bbb bbd bbm bbn bbu bda bdb bdd bdm bdu bma bmb bmd bmm bmn bmu bna bnb bnd bnn bnu bua bub bud bum bun buu daa dab dad dam dan dau dba dbb dbd dbm dbn dbu dda ddb ddd ddm ddn ddu dma dmb dmd dmm dmn dmu dna dnb dnd dnm dnn dua dub dud dum dun maa mab mad mam man mau mba mbb mbd mbm mbu mda mdb mdd mdm mdn mdu mma mmb mmd mmm mmn mmu mna mnb mnm mnn mnu mua mub mud mum mun muu naa nab nad nam nan nau nba nbb nbd nbm nbn nbu nda ndb ndd ndm ndn ndu nma nmb nmd nmm nmn nmu nna nnb nnm nnn nnu nua nub nud num nun nuu ua- uaa uab uad uam uan uau uba ubb ubn ubu uda udb udd udm udn udu um- uma umb umd umm umn umu un- una unb und unm unn unu uua uum uun uuu