-er a-a a-b aaa aab aad aae aag aah aan aar ab- aba abb abd abe abg abh abn abr ad- ada adb add ade adg adh adn adr aea aeb aed aee aeg aeh aen aer ag- aga agb agd age agg agh agn agr aha ahb ahd ahe ahg ahh ahn ahr an- ana anb and ane ang anh ann anr ar- ara arb ard are arg arh arn arr baa bab bad bae bag bah ban bar bba bbb bbd bbe bbg bbh bbn bbr bda bdb bdd bde bdg bdh bdr be- bea beb bed bee beg beh ben ber bga bgb bgd bge bgg bgh bgn bgr bha bhb bhd bhe bhg bhh bhr bna bnb bnd bne bng bnn bnr bra brb brd bre brg brh brn brr daa dab dad dae dag dah dan dar dba dbb dbd dbe dbg dbh dbn dbr dda ddb ddd dde ddg ddh ddn ddr de- dea deb ded dee deg deh den der dga dgd dge dgg dgh dgn dgr dh- dha dhb dhd dhe dhh dhr dna dnb dnd dne dng dnh dnn dnr dra drb drd dre drg drn drr eaa eab ead eae eag eah ean ear eba ebb ebd ebe ebg ebh ebn ebr ed- eda edb edd ede edg edh edn edr eea eeb eed eee eeg een eer ega egb egd ege egg egh egn egr eha ehb ehd ehe ehg ehh ehn ehr en- ena enb end ene eng enh enn enr era erb erd ere erg erh ern err g-d gaa gab gad gae gag gah gan gar gba gbd gbe gbg gbh gbn gbr gda gdb gdd gde gdh gdn gdr ge- gea geb ged gee geg geh gen ger gga ggb ggd ggg ggh ggn ggr gha ghb ghd ghe ghg ghh ghn ghr gna gnb gnd gne gnn gnr gra grb grd gre grg grh grn grr haa hab had hae hag hah han har hba hbb hbd hbe hbg hbh hbn hbr hda hdb hdd hde hdg hdh hdn hdr he- hea heb hed hee heg heh hen her hga hgb hge hgg hgh hgn hgr hha hhb hhd hhe hhg hhh hhn hhr hna hnb hnd hne hng hnh hnn hr- hra hrb hrd hre hrg hrh hrn hrr naa nab nad nae nag nah nan nar nba nbb nbd nbe nbg nbn nbr nda ndb ndd nde ndg ndh ndn ndr ne- nea neb ned nee neg neh nen ner nga ngb ngd nge ngg ngh ngn nha nhb nhd nhe nhg nhh nhn nhr nna nnb nne nng nnh nnn nra nrb nrd nre nrg nrn nrr ra- raa rab rad rae rag rah ran rar rba rbb rbd rbe rbg rbh rbn rbr rda rdb rdd rde rdg rdh rdn rdr re- rea reb red ree reg reh ren rer rga rgb rgd rge rgg rgh rgn rgr rh- rha rhb rhd rhe rhg rhh rhn rhr rna rnb rnd rng rnh rnn rnr rra rrb rrd rrg rrh rrn rrr