-al -ol a-a a-b aaa aab aad aaf aah aal aao aar ab- aba abb abd abf abh abl abo abr ad- ada adb add adf adh adl ado adr af- afa afb afd aff afh afl afo afr aha ahb ahd ahf ahh ahl aho ahr al- ala alb ald alf alh all alo alr aoa aob aod aof aoh aol aoo aor ar- ara arb ard arf arh arl aro arr baa bab bad baf bah bal bao bar bba bbb bbd bbf bbh bbl bbo bbr bda bdb bdd bdf bdh bdl bdo bdr bfa bfb bfd bff bfh bfl bfo bfr bha bhb bhd bhf bhh bhl bho bhr bla blb bld blf blh bll blo blr boa bob bod bof boh bol boo bor bra brb brd brf brh brl bro brr daa dab dad daf dah dal dao dar dba dbb dbd dbf dbh dbl dbo dbr dda ddb ddd ddf ddh ddl ddo ddr dfa dfb dfd dff dfh dfl dfo dfr dh- dha dhb dhd dhf dhh dhl dho dhr dl- dla dlb dld dlf dlh dll dlo dlr doa dob dod dof doh dol doo dor dra drb drd drl dro drr faa fab fad faf fah fal fao far fba fbb fbd fbf fbh fbl fbo fbr fda fdb fdd fdf fdh fdl fdo fdr ffa ffd fff ffh ffl ffo ffr fha fhb fhf fhh fhl fho fhr fla flb fld flf fll flo flr foa fob fof foh fol foo for fra frb frd frf frh frl fro frr haa hab had haf hah hal hao har hba hbb hbd hbf hbh hbl hbo hbr hda hdb hdd hdf hdh hdl hdo hdr hfa hfb hfd hff hfh hfl hfo hfr hha hhb hhd hhf hhh hhl hho hhr hla hlb hld hlf hlh hll hlo hlr hoa hob hod hof hoh hol hoo hor hr- hra hrb hrd hrf hrh hrl hro hrr la- laa lab lad laf lah lal lao lar lba lbb lbd lbf lbh lbl lbo lbr lda ldb ldd ldf ldh ldl ldo ldr lfa lfb lfd lff lfh lfl lfo lfr lha lhb lhd lhf lhh lho lhr lla llb lld llf lll llo llr loa lob lod lof loh lol loo lor lra lrb lrd lrf lrh lro lrr oaa oab oad oaf oah oal oao oar ob- oba obb obd obf obh obl obo obr oda odb odd odf odh odl odo odr of- ofa ofb ofd off ofl ofo ofr oha ohd ohf ohh ohl oho ohr ola olb old olf oll olo oo- ooa oob ood oof ooh ool ooo oor or- ora orb ord orf orh orl oro orr ra- raa rab rad raf rah ral rao rar rba rbb rbd rbf rbh rbl rbo rbr rda rdb rdd rdf rdh rdl rdo rdr rfa rfb rfd rff rfh rfl rfo rfr rh- rha rhb rhd rhf rhh rhl rho rhr rla rld rlf rlh rll rlo rlr roa rob rod rof roh rol roo ror rra rrb rrd rrf rrh rrl rrr