a-a a-b a-i aaa aab aai aak aao aar aau aav ab- aba abb abi abk abo abr abu abv ai- aia aib aii aik aio air aiu aiv aka akb aki akk ako akr aku akv aoa aob aoi aok aoo aor aou aov ar- ara arb ari ark aro arr aru arv au- aua aub aui auk auo aur auv av- ava avb avi avk avo avr avu b-u baa bab bai bak bao bar bau bav bba bbb bbi bbk bbo bbr bbu bi- bia bib bii bik bio bir biu biv bka bkb bkk bko bkr bkv boa bob boi bok boo bor bou bov bra brb bri brk bro brr bru brv bua bub bui buk buo bur buu bva bvb bvi bvk bvo bvr bvu bvv i-v ia- iaa iab iai iao iar iau iav iba ibb ibi ibk ibo ibr ibu ibv iia iib iii iio iir iiu ika ikb iki ikk iko ikr iku ikv io- ioa iob ioi ioo ior iou iov ir- ira irb iri irk iro irr iru irv iu- iua iub iui iur iva ivb ivi ivo ivr ivu ivv ka- kaa kab kai kak kao kar kau kav kba kbb kbi kbk kbo kbr kbu kia kib kii kik kio kir kiu kiv kkb kki kkk kkr kku kkv koa kob koi kok koo kor kou kra kri krk kro krr kru krv kub kui kuk kur kuu kva kvb kvi kvk kvo kvr kvv o-i oaa oab oai oak oao oar oau oav ob- oba obb obi obk obo obr obu obv oia oib oii oik oio oir oiu oiv oka okb oki okk oko okr oku oo- ooa oob ooi ook ooo oor oov or- ora orb ori ork oro orr oru orv ou- oua oui ouk ouo our ov- ova ovb ovi ovo ovv ra- raa rab rai rak rao rar rau rav rba rbb rbi rbk rbo rbr rbu ria rib rii rik rio rir riv rkb rkk rko rku rkv roa rob roi rok roo ror rou rov rra rrb rri rrk rrr rru rua rub rui ruk ruo rur ruu ruv rva rvb rvi rvo rvr rvu rvv ua- uaa uab uai uak uao uar uau uav uba ubb ubi ubk ubo ubr ubu ubv uia uib uii uio uir uiu uka ukb uki ukk ukr uku uoa uob uok uoo uor ur- ura urb uri urk uro urr uru uua uur uuu uva uvb uvo uvu uvv v-a vaa vab vai vak vao var vau vav vba vbi vbk vbo vbr vbv vi- via vib vii vik vio vir viu viv vka vkb voa vob voi vok voo vor vou vov vra vrb vri vrk vrr vru vuk vur vuv vva vvb vvi vvo vvr vvv