-al -ol a-a a-c aaa aac aad aae aaf aag aal aao ac- aca acc acd ace acf acg acl aco ad- ada adc add ade adf adg adl ado aea aec aed aee aef aeg ael aeo af- afa afc afd afe aff afg afl afo ag- aga agc agd age agf agg agl ago al- ala alc ald ale alf alg all alo aoa aoc aod aoe aof aog aol aoo c-- caa cac cad cae caf cag cal cao cca ccc ccd cce ccf ccg ccl cco cda cdc cdd cde cdf cdg cdl cdo ce- cea cec ced cee cef ceg cel ceo cfa cfc cfd cfe cff cfg cfl cfo cga cgc cgd cge cgg cgl cgo cl- cla clc cld cle clf clg cll clo co- coa coc cod coe cof cog col coo daa dac dad dae daf dag dal dao dca dcc dcd dce dcf dcg dcl dco dda ddc ddd dde ddf ddg ddl ddo de- dea dec ded dee def deg del deo dfa dfc dfd dfe dff dfg dfl dfo dga dgc dgd dge dgf dgg dgl dl- dla dlc dld dle dlf dlg dll dlo doa doc dod doe dof dog dol doo eaa eac ead eae eaf eag eal eao ec- eca ecc ecd ece ecf ecg ecl eco ed- eda edc edd ede edf edg edl edo eea eec eed eee eef eeg eel eeo ef- efa efc efd efe eff efg efl efo ega egc egd ege egf egg egl ego ela elc eld ele elf elg ell elo eo- eoa eoc eod eoe eof eog eol eoo faa fac fad fae faf fag fal fao fca fcc fcd fce fcf fcg fcl fco fda fdc fdd fde fdf fdg fdl fdo fea fec fed fee fef feg fel feo ffa ffc ffd ffe fff ffg ffl ffo fga fgc fgd fge fgf fgg fgl fla flc fld fle flf flg fll flo foa foc foe fof fog fol foo g-d gaa gac gad gae gaf gag gal gao gca gcc gcd gce gcf gcg gcl gco gda gdc gdd gde gdf gdl gdo ge- gea gec ged gee gef geg gel geo gfa gfc gfd gfe gff gfl gfo gga ggc ggd ggg ggo gla glc gld gle glf glg gll glo goa goc god goe gof gog gol goo la- laa lac lad lae laf lag lal lao lca lcc lcd lce lcf lcg lcl lco lda ldc ldd lde ldf ldg ldl ldo lea lec led lee lef leg lel leo lfa lfc lfd lfe lff lfg lfl lfo lga lgc lgd lge lgf lgg lgl lgo lla llc lld lle llf llg lll llo loa loc lod loe lof log lol loo oaa oac oad oae oaf oag oal oao oc- oca occ ocd ocf ocg ocl oco oda odc odd ode odf odg odl odo oea oec oed oee oef oeg oel oeo of- ofa ofc ofd ofe off ofg ofl ofo oga ogc ogd oge ogf ogg ogl ogo ola olc old ole olf olg oll olo oo- ooa ooc ood oof oog ool ooo