a-a a-b aaa aab aah aam aan aao aau ab- aba abb abh abm abn abo abu aha ahb ahh ahm ahn aho ahu ama amb amh amm amn amo amu an- ana anb anh anm ann ano anu aoa aob aoh aom aon aoo aou au- aua aub auh aum aun auo b-u baa bab bah bam ban bao bau bba bbb bbh bbm bbn bbo bbu bha bhb bhh bhm bho bhu bma bmb bmh bmm bmn bmo bmu bna bnb bnn bno bnu boa bob boh bom bon boo bou bua bub buh bum bun buo buu haa hab hah ham han hao hau hba hbb hbh hbm hbn hbo hbu hha hhb hhh hhm hhn hho hhu hma hmb hmh hmm hmo hmu hna hnb hnh hnn hno hnu hoa hob hoh hom hon hoo hou hua hub huh hum hun huo huu m-o maa mab mah mam man mao mau mba mbb mbh mbm mbo mbu mha mhh mhm mhn mho mhu mma mmb mmh mmm mmn mmo mmu mna mnb mnm mnn mno mnu moa mob moh mom mon moo mou mua mub muh mum mun muu naa nab nah nam nan nao nau nba nbb nbm nbn nbo nbu nha nhb nhh nhm nhn nhu nma nmb nmh nmm nmn nmo nmu nna nnb nnh nnm nnn nno nnu no- noa nob noh nom non noo nou nua nub nuh num nun nuo nuu oaa oab oah oam oan oao oau ob- oba obb obh obm obn obo obu oha ohh ohm ohn oho ohu om- oma omb omh omm omn omo omu on- ona onb onh onn ono onu oo- ooa oob ooh oom oon ooo ou- oua ouh oum oun ouo ua- uaa uab uah uam uan uao uau uba ubb ubh ubn ubo ubu uha uhb uhh uhm uho uhu um- uma umb umh umm umn umo umu un- una unb unh unm unn uno unu uoa uob uom uon uoo uua uum uun uuu