-al -ol a-a a-b a-i aaa aab aae aai aal aao ab- aba abb abe abi abl abo aea aeb aee aei ael aeo ai- aia aib aie aii ail aio al- ala alb ale ali all alo aoa aob aoe aoi aol aoo baa bab bae bai bal bao bba bbb bbe bbi bbl bbo be- bea beb bee bei bel beo bi- bia bib bie bii bil bio bla blb ble bli bll blo boa bob boe boi bol boo eaa eab eae eai eal eao eba ebb ebe ebi ebl ebo eea eeb eee eel eeo eia eib eie eii eil eio ela elb ele eli ell elo eo- eoa eob eoe eoi eol eoo ia- iaa iab iae iai ial iao iba ibb ibe ibi ibl ibo ie- iea iee iei iel iia iib iie iii iil iio il- ila ilb ile ili ill ilo io- ioa iob ioe ioi iol ioo la- laa lab lae lai lal lao lba lbb lbe lbi lbl lbo lea leb lee lei lel leo lia lib lie lii lil lio lla llb lle lli lll llo loa lob loe loi lol loo o-i oaa oab oae oai oal oao ob- oba obb obe obi obl obo oea oeb oee oei oel oeo oia oib oie oii oil oio ola olb ole oli oll olo oo- ooa oob ooi ool ooo