a-a a-b aaa aab aad aah aan aao aar aau ab- aba abb abd abh abn abo abr abu ad- ada adb add adh adn ado adr adu aha ahb ahd ahh ahn aho ahr ahu an- ana anb and anh ann ano anr anu aoa aob aod aoh aon aoo aor aou ar- ara arb ard arh arn aro arr aru au- aua aub aud auh aun auo aur b-u baa bab bad bah ban bao bar bau bba bbb bbd bbh bbn bbo bbr bbu bda bdb bdd bdh bdo bdr bdu bha bhb bhd bhh bho bhr bhu bna bnb bnd bnn bno bnr bnu boa bob bod boh bon boo bor bou bra brb brd brh brn bro brr bru bua bub bud buh bun buo bur buu daa dab dad dah dan dao dar dau dba dbb dbd dbh dbn dbo dbr dbu dda ddb ddd ddh ddn ddo ddr ddu dh- dha dhb dhd dhh dho dhr dhu dna dnb dnd dnh dnn dno dnr doa dob dod doh don doo dor dou dra drb drd drn dro drr dru dua dub dud duh dun duo dur haa hab had hah han hao har hau hba hbb hbd hbh hbn hbo hbr hbu hda hdb hdd hdh hdn hdo hdr hdu hha hhb hhd hhh hhn hho hhr hhu hna hnb hnd hnh hnn hno hnu hoa hob hod hoh hon hoo hor hou hr- hra hrb hrd hrh hrn hro hrr hru hua hub hud huh hun huo hur huu naa nab nad nah nan nao nar nau nba nbb nbd nbn nbo nbr nbu nda ndb ndd ndh ndn ndo ndr ndu nha nhb nhd nhh nhn nhr nhu nna nnb nnh nnn nno nnu no- noa nob nod noh non noo nor nou nra nrb nrd nrn nro nrr nru nua nub nud nuh nun nuo nur nuu oaa oab oad oah oan oao oar oau ob- oba obb obd obh obn obo obr obu oda odb odd odh odn odo odr odu oha ohd ohh ohn oho ohr ohu on- ona onb ond onh onn ono onr onu oo- ooa oob ood ooh oon ooo oor or- ora orb ord orh orn oro orr oru ou- oua oud ouh oun ouo our ra- raa rab rad rah ran rao rar rau rba rbb rbd rbh rbn rbo rbr rbu rda rdb rdd rdh rdn rdo rdr rdu rh- rha rhb rhd rhh rhn rho rhr rhu rna rnb rnd rnh rnn rno rnr rnu roa rob rod roh ron roo ror rou rra rrb rrd rrh rrn rrr rru rua rub rud ruh run ruo rur ruu ua- uaa uab uad uah uan uao uar uau uba ubb ubh ubn ubo ubr ubu uda udb udd udn udo udr udu uha uhb uhd uhh uho uhr uhu un- una unb und unh unn uno unr unu uoa uob uod uon uoo uor ur- ura urb urd urn uro urr uru uua uun uur uuu