-al -ol a-a a-b a-i aaa aab aae aaf aai aal aao ab- aba abb abe abf abi abl abo aea aeb aee aef aei ael aeo af- afa afb afe aff afi afl afo ai- aia aib aie aif aii ail aio al- ala alb ale alf ali all alo aoa aob aoe aof aoi aol aoo baa bab bae baf bai bal bao bba bbb bbe bbf bbi bbl bbo be- bea beb bee bef bei bel beo bfa bfb bfe bff bfi bfl bfo bi- bia bib bie bif bii bil bio bla blb ble blf bli bll blo boa bob boe bof boi bol boo eaa eab eae eaf eai eal eao eba ebb ebe ebf ebi ebl ebo eea eeb eee eef eel eeo ef- efa efb efe eff efi efl efo eia eib eie eif eii eil eio ela elb ele elf eli ell elo eo- eoa eob eoe eof eoi eol eoo faa fab fae faf fai fal fao fba fbb fbe fbf fbi fbl fbo fea feb fee fef fei fel feo ffa ffe fff ffi ffl ffo fia fib fie fif fii fil fla flb fle flf fli fll flo foa fob foe fof foi fol foo i-f ia- iaa iab iae iaf iai ial iao iba ibb ibe ibf ibi ibl ibo ie- iea iee ief iei iel ifa ifb ife iff ifi ifl ifo iia iib iie iif iii iil iio il- ila ilb ile ilf ili ill ilo io- ioa iob ioe iof ioi iol ioo la- laa lab lae laf lai lal lao lba lbb lbe lbf lbi lbl lbo lea leb lee lef lei lel leo lfa lfb lfe lff lfi lfl lfo lia lib lie lif lii lil lio lla llb lle llf lli lll llo loa lob loe lof loi lol loo o-i oaa oab oae oaf oai oal oao ob- oba obb obe obf obi obl obo oea oeb oee oef oei oel oeo of- ofa ofb ofe off ofi ofl ofo oia oib oie oif oii oil oio ola olb ole olf oli oll olo oo- ooa oob oof ooi ool ooo