a-a a-b aaa aab aag aah aan aao aau ab- aba abb abg abh abn abo abu ag- aga agb agg agh agn ago agu aha ahb ahg ahh ahn aho ahu an- ana anb ang anh ann ano anu aoa aob aog aoh aon aoo aou au- aua aub aug auh aun auo b-u baa bab bag bah ban bao bau bba bbb bbg bbh bbn bbo bbu bga bgb bgg bgh bgn bgo bgu bha bhb bhg bhh bho bhu bna bnb bng bnn bno bnu boa bob bog boh bon boo bou bua bub bug buh bun buo buu gaa gab gag gah gan gao gau gba gbg gbh gbn gbo gbu gga ggb ggg ggh ggn ggo ggu gha ghb ghg ghh ghn gho gna gnb gnn gno gnu goa gob gog goh gon goo gou gu- gua gub gug gun guo guu haa hab hag hah han hao hau hba hbb hbg hbh hbn hbo hbu hga hgb hgg hgh hgn hgo hgu hha hhb hhg hhh hhn hho hhu hna hnb hng hnh hnn hno hnu hoa hob hog hoh hon hoo hou hua hub hug huh hun huo huu naa nab nag nah nan nao nau nba nbb nbg nbn nbo nbu nga ngb ngg ngh ngn ngo ngu nha nhb nhg nhh nhn nhu nna nnb nng nnh nnn nno nnu no- noa nob nog noh non noo nou nua nub nug nuh nun nuo nuu oaa oab oag oah oan oao oau ob- oba obb obg obh obn obo obu oga ogg ogh ogn ogo oha ohg ohh ohn oho ohu on- ona onb ong onh onn ono onu oo- ooa oob oog ooh oon ooo ou- oua ouh oun ouo ua- uaa uab uag uah uan uao uau uba ubb ubg ubh ubn ubo ubu uga ugb ugg ugh ugn ugo ugu uha uhb uhh uho uhu un- una unb ung unh unn uno unu uoa uob uog uon uoo uua uug uun uuu