-er a-a aaa aad aae aaf aag aap aar ad- ada add ade adf adg adp adr aea aed aee aef aeg aep aer af- afa afd afe aff afg afp afr ag- aga agd age agf agg agp agr ap- apa apd ape apf apg app apr ar- ara ard are arf arg arp arr daa dad dae daf dag dap dar dda ddd dde ddf ddg ddp ddr de- dea ded dee def deg dep der dfa dfd dfe dff dfg dfp dfr dga dgd dge dgf dgg dgp dgr dpa dpd dpe dpf dpg dpp dpr dra drd dre drg drp drr eaa ead eae eaf eag eap ear ed- eda edd ede edf edg edp edr eea eed eee eef eeg eep eer ef- efa efd efe eff efg efp efr ega egd ege egf egg egp egr ep- epa epd epe epf epg epp epr era erd ere erf erg erp err faa fad fae faf fag fap far fda fdd fde fdf fdg fdp fdr fea fed fee fef feg fep fer ffa ffd ffe fff ffg ffp ffr fga fgd fge fgf fgg fgp fgr fpa fpd fpe fpg fpp fpr fra frd fre frf frg frp frr g-d g-p gaa gad gae gaf gag gap gar gda gdd gde gdf gdp gdr ge- gea ged gee gef geg gep ger gfa gfd gfe gff gfp gfr gga ggd ggg ggp ggr gpa gpd gpe gpf gpg gpp gpr gra grd gre grf grg grp grr p-p paa pad pae paf pag pap par pda pdd pde pdf pdg pdp pdr pea ped pee pef peg pep per pfa pfd pfe pff pfg pfp pfr pga pgd pge pgf pgg pgp pgr ppa ppd ppe ppf ppg ppp ppr pra prd pre prf prg prp prr ra- raa rad rae raf rag rap rar rda rdd rde rdf rdg rdp rdr re- rea red ree ref reg rep rer rfa rfd rfe rff rfg rfp rfr rga rgd rge rgf rgg rgp rgr rpa rpd rpe rpf rpg rpp rpr rra rrd rrf rrg rrp rrr