-al -ol a-a a-b a-i aaa aab aai aal aao ab- aba abb abi abl abo ai- aia aib aii ail aio al- ala alb ali all alo aoa aob aoi aol aoo baa bab bai bal bao bba bbb bbi bbl bbo bi- bia bib bii bil bio bla blb bli bll blo boa bob boi bol boo ia- iaa iab iai ial iao iba ibb ibi ibl ibo iia iib iii iil iio il- ila ilb ili ill ilo io- ioa iob ioi iol ioo la- laa lab lai lal lao lba lbb lbi lbl lbo lia lib lii lil lio lla llb lli lll llo loa lob loi lol loo o-i oaa oab oai oal oao ob- oba obb obi obl obo oia oib oii oil oio ola olb oli oll olo oo- ooa oob ooi ool ooo