-er a-a a-b aaa aab aad aae aag aam aar ab- aba abb abd abe abg abm abr ad- ada adb add ade adg adm adr aea aeb aed aee aeg aem aer ag- aga agb agd age agg agm agr ama amb amd ame amg amm amr ar- ara arb ard are arg arm arr baa bab bad bae bag bam bar bba bbb bbd bbe bbg bbm bbr bda bdb bdd bde bdg bdm bdr be- bea beb bed bee beg bem ber bga bgb bgd bge bgg bgm bgr bma bmb bmd bme bmg bmm bmr bra brb brd bre brg brm brr daa dab dad dae dag dam dar dba dbb dbd dbe dbg dbm dbr dda ddb ddd dde ddg ddm ddr de- dea deb ded dee deg dem der dga dgd dge dgg dgm dgr dma dmb dmd dme dmg dmm dmr dra drb drd dre drg drm drr eaa eab ead eae eag eam ear eba ebb ebd ebe ebg ebm ebr ed- eda edb edd ede edg edm edr eea eeb eed eee eeg eem eer ega egb egd ege egg egm egr em- ema emb emd eme emg emm emr era erb erd ere erg erm err g-d gaa gab gad gae gag gam gar gba gbd gbe gbg gbm gbr gda gdb gdd gde gdm gdr ge- gea geb ged gee geg gem ger gga ggb ggd ggg ggm ggr gma gmb gmd gme gmg gmm gmr gra grb grd gre grg grm grr m-r maa mab mad mae mag mam mar mba mbb mbd mbe mbg mbm mbr mda mdb mdd mde mdg mdm mdr mea meb med mee meg mem mer mga mgb mgd mge mgm mgr mma mmb mmd mme mmg mmm mmr mra mrb mrd mre mrg mrm mrr ra- raa rab rad rae rag ram rar rba rbb rbd rbe rbg rbm rbr rda rdb rdd rde rdg rdm rdr re- rea reb red ree reg rem rer rga rgb rgd rge rgg rgr rma rmb rmd rme rmg rmm rmr rra rrb rrd rrg rrm rrr