a-a a-b a-i aaa aab aai aak aav aay ab- aba abb abi abk abv aby ai- aia aib aii aik aiv aiy aka akb aki akk akv av- ava avb avi avk avy ay- aya ayi ayk baa bab bai bak bav bay bba bbb bbi bbk bby bi- bia bib bii bik biv biy bka bkb bkk bkv bva bvb bvi bvk bvv by- bya byi byk i-v ia- iaa iab iai iav iba ibb ibi ibk ibv iby iia iib iii ika ikb iki ikk ikv iva ivb ivi ivv ivy iya iyy ka- kaa kab kai kak kav kay kba kbb kbi kbk kia kib kii kik kiv kkb kki kkk kkv kky kva kvb kvi kvk kvv kya v-a vaa vab vai vak vav vay vba vbi vbk vbv vi- via vib vii vik viv viy vka vkb vva vvb vvi vvv yaa yab yai yak yav yay ybi yby yii yka yki ykk yva yvi yvy yyb yyy