a-a a-b aaa aab aah aan aao aar aau aav ab- aba abb abh abn abo abr abu abv aha ahb ahh ahn aho ahr ahu ahv an- ana anb anh ann ano anr anu anv aoa aob aoh aon aoo aor aou aov ar- ara arb arh arn aro arr aru arv au- aua aub auh aun auo aur auv av- ava avb avh avn avo avr avu b-u baa bab bah ban bao bar bau bav bba bbb bbh bbn bbo bbr bbu bha bhb bhh bho bhr bhu bhv bna bnb bnn bno bnr bnu bnv boa bob boh bon boo bor bou bov bra brb brh brn bro brr bru brv bua bub buh bun buo bur buu bva bvb bvh bvn bvo bvr bvu bvv haa hab hah han hao har hau hav hba hbb hbh hbn hbo hbr hbu hbv hha hhb hhh hhn hho hhr hhu hhv hna hnb hnh hnn hno hnu hnv hoa hob hoh hon hoo hor hou hov hr- hra hrb hrh hrn hro hrr hru hrv hua hub huh hun huo hur huu huv hv- hva hvb hvn hvo hvr hvv naa nab nah nan nao nar nau nav nba nbb nbn nbo nbr nbu nbv nha nhb nhh nhn nhr nhu nhv nna nnb nnh nnn nno nnu nnv no- noa nob noh non noo nor nou nov nra nrb nrn nro nrr nru nrv nua nub nuh nun nuo nur nuu nuv nva nvb nvh nvn nvu nvv oaa oab oah oan oao oar oau oav ob- oba obb obh obn obo obr obu obv oha ohh ohn oho ohr ohu on- ona onb onh onn ono onr onu oo- ooa oob ooh oon ooo oor oov or- ora orb orh orn oro orr oru orv ou- oua ouh oun ouo our ov- ova ovb ovh ovo ovv ra- raa rab rah ran rao rar rau rav rba rbb rbh rbn rbo rbr rbu rh- rha rhb rhh rhn rho rhr rhu rhv rna rnb rnh rnn rno rnr rnu rnv roa rob roh ron roo ror rou rov rra rrb rrh rrn rrr rru rua rub ruh run ruo rur ruu ruv rva rvb rvh rvn rvo rvr rvu rvv ua- uaa uab uah uan uao uar uau uav uba ubb ubh ubn ubo ubr ubu ubv uha uhb uhh uho uhr uhu uhv un- una unb unh unn uno unr unu unv uoa uob uon uoo uor ur- ura urb urn uro urr uru uua uun uur uuu uva uvb uvo uvu uvv v-a vaa vab vah van vao var vau vav vba vbh vbo vbr vbv vh- vha vhb vho vn- vna vno vnr vnu vnv voa vob voh von voo vor vou vov vra vrb vrh vrn vrr vru vur vuv vva vvb vvo vvr vvv