-al -er -ol a-a a-b aaa aab aae aal aao aar ab- aba abb abe abl abo abr aea aeb aee ael aeo aer al- ala alb ale all alo alr aoa aob aoe aol aoo aor ar- ara arb are arl aro arr baa bab bae bal bao bar bba bbb bbe bbl bbo bbr be- bea beb bee bel beo ber bla blb ble bll blo blr boa bob boe bol boo bor bra brb bre brl bro brr eaa eab eae eal eao ear eba ebb ebe ebl ebo ebr eea eeb eee eel eeo eer ela elb ele ell elo elr eo- eoa eob eoe eol eoo eor era erb ere erl ero err la- laa lab lae lal lao lar lba lbb lbe lbl lbo lbr lea leb lee lel leo ler lla llb lle lll llo llr loa lob loe lol loo lor lra lrb lro lrr oaa oab oae oal oao oar ob- oba obb obe obl obo obr oea oeb oee oel oeo oer ola olb ole oll olo oo- ooa oob ool ooo oor or- ora orb ore orl oro orr ra- raa rab rae ral rao rar rba rbb rbe rbl rbo rbr re- rea reb ree rel reo rer rla rle rll rlo rlr roa rob roe rol roo ror rra rrb rrl rrr