a-a a-b aaa aab aad aae aam aan aau ab- aba abb abd abe abm abn abu ad- ada adb add ade adm adn adu aea aeb aed aee aem aen aeu ama amb amd ame amm amn amu an- ana anb and ane anm ann anu au- aua aub aud aue aum aun b-u baa bab bad bae bam ban bau bba bbb bbd bbe bbm bbn bbu bda bdb bdd bde bdm bdu be- bea beb bed bee bem ben beu bma bmb bmd bme bmm bmn bmu bna bnb bnd bne bnn bnu bua bub bud bue bum bun buu daa dab dad dae dam dan dau dba dbb dbd dbe dbm dbn dbu dda ddb ddd dde ddm ddn ddu de- dea deb ded dee dem den deu dma dmb dmd dme dmm dmn dmu dna dnb dnd dne dnm dnn dua dub dud due dum dun eaa eab ead eae eam ean eau eba ebb ebd ebe ebm ebn ebu ed- eda edb edd ede edm edn edu eea eeb eed eee eem een em- ema emb emd eme emm emn emu en- ena enb end ene enm enn enu eu- eua eub eud eue eun maa mab mad mae mam man mau mba mbb mbd mbe mbm mbu mda mdb mdd mde mdm mdn mdu mea meb med mee mem men meu mma mmb mmd mme mmm mmn mmu mna mnb mne mnm mnn mnu mua mub mud mue mum mun muu naa nab nad nae nam nan nau nba nbb nbd nbe nbm nbn nbu nda ndb ndd nde ndm ndn ndu ne- nea neb ned nee nem nen neu nma nmb nmd nme nmm nmn nmu nna nnb nne nnm nnn nnu nua nub nud nue num nun nuu ua- uaa uab uad uae uam uan uau uba ubb ube ubn ubu uda udb udd ude udm udn udu uea ueb ued uee uem uen um- uma umb umd ume umm umn umu un- una unb und une unm unn unu uua uue uum uun uuu