a-a a-b a-z aaa aab aah aar aau aaz ab- aba abb abh abr abu abz aha ahb ahh ahr ahu ahz ar- ara arb arh arr aru arz au- aua aub auh aur auz az- aza azb azu azz b-u baa bab bah bar bau baz bba bbb bbh bbr bbu bha bhb bhh bhr bhu bra brb brh brr bru brz bua bub buh bur buu buz bza bzh bzr bzu bzz haa hab hah har hau haz hba hbb hbh hbr hbu hbz hha hhb hhh hhr hhu hhz hr- hra hrb hrh hrr hru hrz hua hub huh hur huu huz ra- raa rab rah rar rau raz rba rbb rbh rbr rbu rh- rha rhb rhh rhr rhu rra rrb rrh rrr rru rua rub ruh rur ruu ruz rza rzb ua- uaa uab uah uar uau uaz uba ubb ubh ubr ubu uha uhb uhh uhr uhu ur- ura urb urr uru urz uua uur uuu uza uzb uzh uzu zaa zab zah zar zaz zbb zbr zha zhr zhu zrh zub zur zuz zzr zzz