-al -ol a-a a-b a-i aaa aab aai aal aao aav ab- aba abb abi abl abo abv ai- aia aib aii ail aio aiv al- ala alb ali all alo alv aoa aob aoi aol aoo aov av- ava avb avi avl avo baa bab bai bal bao bav bba bbb bbi bbl bbo bi- bia bib bii bil bio biv bla blb bli bll blo blv boa bob boi bol boo bov bva bvb bvi bvl bvo bvv i-v ia- iaa iab iai ial iao iav iba ibb ibi ibl ibo ibv iia iib iii iil iio il- ila ilb ili ill ilo ilv io- ioa iob ioi iol ioo iov iva ivb ivi ivl ivo ivv la- laa lab lai lal lao lav lba lbb lbi lbl lbo lbv lia lib lii lil lio liv lla llb lli lll llo llv loa lob loi lol loo lov lva lvb lvi lvl lvv o-i oaa oab oai oal oao oav ob- oba obb obi obl obo obv oia oib oii oil oio oiv ola olb oli oll olo oo- ooa oob ooi ool ooo oov ov- ova ovb ovi ovl ovo ovv v-a vaa vab vai val vao vav vba vbi vbl vbo vbv vi- via vib vii vil vio viv vl- vla vlb vll vlo vlv voa vob voi vol voo vov vva vvb vvi vvo vvv