a-a a-b aaa aab aad aah aan aar aau ab- aba abb abd abh abn abr abu ad- ada adb add adh adn adr adu aha ahb ahd ahh ahn ahr ahu an- ana anb and anh ann anr anu ar- ara arb ard arh arn arr aru au- aua aub aud auh aun aur b-u baa bab bad bah ban bar bau bba bbb bbd bbh bbn bbr bbu bda bdb bdd bdh bdr bdu bha bhb bhd bhh bhr bhu bna bnb bnd bnn bnr bnu bra brb brd brh brn brr bru bua bub bud buh bun bur buu daa dab dad dah dan dar dau dba dbb dbd dbh dbn dbr dbu dda ddb ddd ddh ddn ddr ddu dh- dha dhb dhd dhh dhr dhu dna dnb dnd dnh dnn dnr dra drb drd drn drr dru dua dub dud duh dun dur haa hab had hah han har hau hba hbb hbd hbh hbn hbr hbu hda hdb hdd hdh hdn hdr hdu hha hhb hhd hhh hhn hhr hhu hna hnb hnd hnh hnn hnu hr- hra hrb hrd hrh hrn hrr hru hua hub hud huh hun hur huu naa nab nad nah nan nar nau nba nbb nbd nbn nbr nbu nda ndb ndd ndh ndn ndr ndu nha nhb nhd nhh nhn nhr nhu nna nnb nnh nnn nnu nra nrb nrd nrn nrr nru nua nub nud nuh nun nur nuu ra- raa rab rad rah ran rar rau rba rbb rbd rbh rbn rbr rbu rda rdb rdd rdh rdn rdr rdu rh- rha rhb rhd rhh rhn rhr rhu rna rnb rnd rnh rnn rnr rnu rra rrb rrd rrh rrn rrr rru rua rub rud ruh run rur ruu ua- uaa uab uad uah uan uar uau uba ubb ubh ubn ubr ubu uda udb udd udn udr udu uha uhb uhd uhh uhr uhu un- una unb und unh unn unr unu ur- ura urb urd urn urr uru uua uun uur uuu