a-a a-b aaa aab aah aak aan aar aau ab- aba abb abh abk abn abr abu aha ahb ahh ahk ahn ahr ahu aka akb akh akk akn akr aku an- ana anb anh ank ann anr anu ar- ara arb arh ark arn arr aru au- aua aub auh auk aun aur b-u baa bab bah bak ban bar bau bba bbb bbh bbk bbn bbr bbu bha bhb bhh bhk bhr bhu bka bkb bkk bkn bkr bna bnb bnk bnn bnr bnu bra brb brh brk brn brr bru bua bub buh buk bun bur buu haa hab hah hak han har hau hba hbb hbh hbk hbn hbr hbu hha hhb hhh hhk hhn hhr hhu hka hkb hkh hkk hkn hkr hku hna hnb hnh hnk hnn hnu hr- hra hrb hrh hrk hrn hrr hru hua hub huh huk hun hur huu ka- kaa kab kah kak kan kar kau kba kbb kbh kbk kbn kbr kbu kha khh khk khn khr khu kkb kkh kkk kkn kkr kku kn- kna knk knn knr knu kra krk krn krr kru kub kuh kuk kun kur kuu naa nab nah nak nan nar nau nba nbb nbk nbn nbr nbu nha nhb nhh nhk nhn nhr nhu nka nkk nkn nkr nku nna nnb nnh nnk nnn nnu nra nrb nrk nrn nrr nru nua nub nuh nuk nun nur nuu ra- raa rab rah rak ran rar rau rba rbb rbh rbk rbn rbr rbu rh- rha rhb rhh rhn rhr rhu rkb rkk rku rna rnb rnh rnn rnr rnu rra rrb rrh rrk rrn rrr rru rua rub ruh ruk run rur ruu ua- uaa uab uah uak uan uar uau uba ubb ubh ubk ubn ubr ubu uha uhb uhh uhr uhu uka ukb ukk ukn ukr uku un- una unb unh unk unn unr unu ur- ura urb urk urn urr uru uua uun uur uuu