-al -er -ol a-a a-b aaa aab aad aae aal aao aar ab- aba abb abd abe abl abo abr ad- ada adb add ade adl ado adr aea aeb aed aee ael aeo aer al- ala alb ald ale all alo alr aoa aob aod aoe aol aoo aor ar- ara arb ard are arl aro arr baa bab bad bae bal bao bar bba bbb bbd bbe bbl bbo bbr bda bdb bdd bde bdl bdo bdr be- bea beb bed bee bel beo ber bla blb bld ble bll blo blr boa bob bod boe bol boo bor bra brb brd bre brl bro brr daa dab dad dae dal dao dar dba dbb dbd dbe dbl dbo dbr dda ddb ddd dde ddl ddo ddr de- dea deb ded dee del deo der dl- dla dlb dld dle dll dlo dlr doa dob dod doe dol doo dor dra drb drd dre drl dro drr eaa eab ead eae eal eao ear eba ebb ebd ebe ebl ebo ebr ed- eda edb edd ede edl edo edr eea eeb eed eee eel eeo eer ela elb eld ele ell elo elr eo- eoa eob eod eoe eol eoo eor era erb erd ere erl ero err la- laa lab lad lae lal lao lar lba lbb lbd lbe lbl lbo lbr lda ldb ldd lde ldl ldo ldr lea leb led lee lel leo ler lla llb lld lle lll llo llr loa lob lod loe lol loo lor lra lrb lrd lro lrr oaa oab oad oae oal oao oar ob- oba obb obd obe obl obo obr oda odb odd ode odl odo odr oea oeb oed oee oel oeo oer ola olb old ole oll olo oo- ooa oob ood ool ooo oor or- ora orb ord ore orl oro orr ra- raa rab rad rae ral rao rar rba rbb rbd rbe rbl rbo rbr rda rdb rdd rde rdl rdo rdr re- rea reb red ree rel reo rer rla rld rle rll rlo rlr roa rob rod roe rol roo ror rra rrb rrd rrl rrr