a-a a-b a-i aaa aab aai aak aan aao aav ab- aba abb abi abk abn abo abv ai- aia aib aii aik ain aio aiv aka akb aki akk akn ako akv an- ana anb ani ank ann ano anv aoa aob aoi aok aon aoo aov av- ava avb avi avk avn avo baa bab bai bak ban bao bav bba bbb bbi bbk bbn bbo bi- bia bib bii bik bin bio biv bka bkb bkk bkn bko bkv bna bnb bni bnk bnn bno bnv boa bob boi bok bon boo bov bva bvb bvi bvk bvn bvo bvv i-v ia- iaa iab iai ian iao iav iba ibb ibi ibk ibn ibo ibv iia iib iii iin iio ika ikb iki ikk iko ikv in- ina inb ini ink inn ino inv io- ioa iob ioi ion ioo iov iva ivb ivi ivo ivv ka- kaa kab kai kak kan kao kav kba kbb kbi kbk kbn kbo kia kib kii kik kin kio kiv kkb kki kkk kkn kkv kn- kna kni knk knn kno koa kob koi kok kon koo kva kvb kvi kvk kvn kvo kvv n-i naa nab nai nak nan nao nav nba nbb nbi nbk nbn nbo nbv nia nib nii nik nin nio niv nka nki nkk nkn nko nna nnb nni nnk nnn nno nnv no- noa nob noi nok non noo nov nva nvb nvi nvk nvn nvv o-i oaa oab oai oak oan oao oav ob- oba obb obi obk obn obo obv oia oib oii oik oin oio oiv oka okb oki okk oko on- ona onb oni onk onn ono oo- ooa oob ooi ook oon ooo oov ov- ova ovb ovi ovo ovv v-a vaa vab vai vak van vao vav vba vbi vbk vbo vbv vi- via vib vii vik vin vio viv vka vkb vn- vna vni vno vnv voa vob voi vok von voo vov vva vvb vvi vvo vvv