-al -ol a-a a-b aaa aab aad aaf aag aal aao aar ab- aba abb abd abf abg abl abo abr ad- ada adb add adf adg adl ado adr af- afa afb afd aff afg afl afo afr ag- aga agb agd agf agg agl ago agr al- ala alb ald alf alg all alo alr aoa aob aod aof aog aol aoo aor ar- ara arb ard arf arg arl aro arr baa bab bad baf bag bal bao bar bba bbb bbd bbf bbg bbl bbo bbr bda bdb bdd bdf bdg bdl bdo bdr bfa bfb bfd bff bfg bfl bfo bfr bga bgb bgd bgf bgg bgl bgo bgr bla blb bld blf blg bll blo blr boa bob bod bof bog bol boo bor bra brb brd brf brg brl bro brr daa dab dad daf dag dal dao dar dba dbb dbd dbf dbg dbl dbo dbr dda ddb ddd ddf ddg ddl ddo ddr dfa dfb dfd dff dfg dfl dfo dfr dga dgd dgf dgg dgl dgr dl- dla dlb dld dlf dlg dll dlo dlr doa dob dod dof dog dol doo dor dra drb drd drg drl dro drr faa fab fad faf fag fal fao far fba fbb fbd fbf fbg fbl fbo fbr fda fdb fdd fdf fdg fdl fdo fdr ffa ffd fff ffg ffl ffo ffr fga fgb fgd fgf fgg fgl fgr fla flb fld flf flg fll flo flr foa fob fof fog fol foo for fra frb frd frf frg frl fro frr g-d gaa gab gad gaf gag gal gao gar gba gbd gbf gbg gbl gbo gbr gda gdb gdd gdf gdl gdo gdr gfa gfb gfd gff gfl gfo gfr gga ggb ggd ggg ggo ggr gla glb gld glf glg gll glo glr goa gob god gof gog gol goo gor gra grb grd grf grg grl gro grr la- laa lab lad laf lag lal lao lar lba lbb lbd lbf lbg lbl lbo lbr lda ldb ldd ldf ldg ldl ldo ldr lfa lfb lfd lff lfg lfl lfo lfr lga lgb lgd lgf lgg lgl lgo lgr lla llb lld llf llg lll llo llr loa lob lod lof log lol loo lor lra lrb lrd lrf lrg lro lrr oaa oab oad oaf oag oal oao oar ob- oba obb obd obf obg obl obo obr oda odb odd odf odg odl odo odr of- ofa ofb ofd off ofg ofl ofo ofr oga ogd ogf ogg ogl ogo ola olb old olf olg oll olo oo- ooa oob ood oof oog ool ooo oor or- ora orb ord orf org orl oro orr ra- raa rab rad raf rag ral rao rar rba rbb rbd rbf rbg rbl rbo rbr rda rdb rdd rdf rdg rdl rdo rdr rfa rfb rfd rff rfg rfl rfo rfr rga rgb rgd rgf rgg rgo rgr rla rld rlf rlg rll rlo rlr roa rob rod rof rog rol roo ror rra rrb rrd rrf rrg rrl rrr