-al -ol a-a a-b aaa aab aad aah aal aao aar ab- aba abb abd abh abl abo abr ad- ada adb add adh adl ado adr aha ahb ahd ahh ahl aho ahr al- ala alb ald alh all alo alr aoa aob aod aoh aol aoo aor ar- ara arb ard arh arl aro arr baa bab bad bah bal bao bar bba bbb bbd bbh bbl bbo bbr bda bdb bdd bdh bdl bdo bdr bha bhb bhd bhh bhl bho bhr bla blb bld blh bll blo blr boa bob bod boh bol boo bor bra brb brd brh brl bro brr daa dab dad dah dal dao dar dba dbb dbd dbh dbl dbo dbr dda ddb ddd ddh ddl ddo ddr dh- dha dhb dhd dhh dhl dho dhr dl- dla dlb dld dlh dll dlo dlr doa dob dod doh dol doo dor dra drb drd drl dro drr haa hab had hah hal hao har hba hbb hbd hbh hbl hbo hbr hda hdb hdd hdh hdl hdo hdr hha hhb hhd hhh hhl hho hhr hla hlb hld hlh hll hlo hlr hoa hob hod hoh hol hoo hor hr- hra hrb hrd hrh hrl hro hrr la- laa lab lad lah lal lao lar lba lbb lbd lbh lbl lbo lbr lda ldb ldd ldh ldl ldo ldr lha lhb lhd lhh lho lhr lla llb lld lll llo llr loa lob lod loh lol loo lor lra lrb lrd lrh lro lrr oaa oab oad oah oal oao oar ob- oba obb obd obh obl obo obr oda odb odd odh odl odo odr oha ohd ohh ohl oho ohr ola olb old oll olo oo- ooa oob ood ooh ool ooo oor or- ora orb ord orh orl oro orr ra- raa rab rad rah ral rao rar rba rbb rbd rbh rbl rbo rbr rda rdb rdd rdh rdl rdo rdr rh- rha rhb rhd rhh rhl rho rhr rla rld rlh rll rlo rlr roa rob rod roh rol roo ror rra rrb rrd rrh rrl rrr