a-a a-b aaa aab aad aam aan aao aau ab- aba abb abd abm abn abo abu ad- ada adb add adm adn ado adu ama amb amd amm amn amo amu an- ana anb and anm ann ano anu aoa aob aod aom aon aoo aou au- aua aub aud aum aun auo b-u baa bab bad bam ban bao bau bba bbb bbd bbm bbn bbo bbu bda bdb bdd bdm bdo bdu bma bmb bmd bmm bmn bmo bmu bna bnb bnd bnn bno bnu boa bob bod bom bon boo bou bua bub bud bum bun buo buu daa dab dad dam dan dao dau dba dbb dbd dbm dbn dbo dbu dda ddb ddd ddm ddn ddo ddu dma dmb dmd dmm dmn dmo dmu dna dnb dnd dnm dnn dno doa dob dod dom don doo dou dua dub dud dum dun duo m-o maa mab mad mam man mao mau mba mbb mbd mbm mbo mbu mda mdb mdd mdm mdn mdo mdu mma mmb mmd mmm mmn mmo mmu mna mnb mnm mnn mno mnu moa mob mod mom mon moo mou mua mub mud mum mun muu naa nab nad nam nan nao nau nba nbb nbd nbm nbn nbo nbu nda ndb ndd ndm ndn ndo ndu nma nmb nmd nmm nmn nmo nmu nna nnb nnm nnn nno nnu no- noa nob nod nom non noo nou nua nub nud num nun nuo nuu oaa oab oad oam oan oao oau ob- oba obb obd obm obn obo obu oda odb odd odm odn odo odu om- oma omb omd omm omn omo omu on- ona onb ond onn ono onu oo- ooa oob ood oom oon ooo ou- oua oud oum oun ouo ua- uaa uab uad uam uan uao uau uba ubb ubn ubo ubu uda udb udd udm udn udo udu um- uma umb umd umm umn umo umu un- una unb und unm unn uno unu uoa uob uod uom uon uoo uua uum uun uuu