a-a a-b a-i aaa aab aad aai aak aao aar aau ab- aba abb abd abi abk abo abr abu ad- ada adb add adi adk ado adr adu ai- aia aib aid aii aik aio air aiu aka akb akd aki akk ako akr aku aoa aob aod aoi aok aoo aor aou ar- ara arb ard ari ark aro arr aru au- aua aub aud aui auk auo aur b-u baa bab bad bai bak bao bar bau bba bbb bbd bbi bbk bbo bbr bbu bda bdb bdd bdi bdk bdo bdr bdu bi- bia bib bid bii bik bio bir biu bka bkb bkk bko bkr boa bob bod boi bok boo bor bou bra brb brd bri brk bro brr bru bua bub bud bui buk buo bur buu daa dab dad dai dak dao dar dau dba dbb dbd dbi dbk dbo dbr dbu dda ddb ddd ddi ddk ddo ddr ddu di- dia dib did dii dik dio dir diu dka dkb dki dkk dko dkr dku doa dob dod doi dok doo dor dou dra drb drd dri drk dro drr dru dua dub dud dui duk duo dur i-d ia- iaa iab iad iai iao iar iau iba ibb ibd ibi ibk ibo ibr ibu ida idb idd idi idk ido idr idu iia iib iid iii iio iir iiu ika ikb iki ikk iko ikr iku io- ioa iob iod ioi ioo ior iou ir- ira irb ird iri irk iro irr iru iu- iua iub iud iui iur ka- kaa kab kad kai kak kao kar kau kba kbb kbd kbi kbk kbo kbr kbu kda kdb kdk kdo kdr kdu kia kib kid kii kik kio kir kiu kkb kki kkk kkr kku koa kob kod koi kok koo kor kou kra krd kri krk kro krr kru kub kud kui kuk kur kuu o-i oaa oab oad oai oak oao oar oau ob- oba obb obd obi obk obo obr obu oda odb odd odi odo odr odu oia oib oid oii oik oio oir oiu oka okb okd oki okk oko okr oku oo- ooa oob ood ooi ook ooo oor or- ora orb ord ori ork oro orr oru ou- oua oud oui ouk ouo our ra- raa rab rad rai rak rao rar rau rba rbb rbd rbi rbk rbo rbr rbu rda rdb rdd rdi rdo rdr rdu ria rib rid rii rik rio rir rkb rkk rko rku roa rob rod roi rok roo ror rou rra rrb rrd rri rrk rrr rru rua rub rud rui ruk ruo rur ruu ua- uaa uab uad uai uak uao uar uau uba ubb ubi ubk ubo ubr ubu uda udb udd udi udk udo udr udu uia uib uid uii uio uir uiu uka ukb uki ukk ukr uku uoa uob uod uok uoo uor ur- ura urb urd uri urk uro urr uru uua uur uuu