a-a a-b aaa aab aah aan aar aau ab- aba abb abh abn abr abu aha ahb ahh ahn ahr ahu an- ana anb anh ann anr anu ar- ara arb arh arn arr aru au- aua aub auh aun aur b-u baa bab bah ban bar bau bba bbb bbh bbn bbr bbu bha bhb bhh bhr bhu bna bnb bnn bnr bnu bra brb brh brn brr bru bua bub buh bun bur buu haa hab hah han har hau hba hbb hbh hbn hbr hbu hha hhb hhh hhn hhr hhu hna hnb hnh hnn hnu hr- hra hrb hrh hrn hrr hru hua hub huh hun hur huu naa nab nah nan nar nau nba nbb nbn nbr nbu nha nhb nhh nhn nhr nhu nna nnb nnh nnn nnu nra nrb nrn nrr nru nua nub nuh nun nur nuu ra- raa rab rah ran rar rau rba rbb rbh rbn rbr rbu rh- rha rhb rhh rhn rhr rhu rna rnb rnh rnn rnr rnu rra rrb rrh rrn rrr rru rua rub ruh run rur ruu ua- uaa uab uah uan uar uau uba ubb ubh ubn ubr ubu uha uhb uhh uhr uhu un- una unb unh unn unr unu ur- ura urb urn urr uru uua uun uur uuu