-er a-a a-b aaa aab aad aae aag aah aar aau ab- aba abb abd abe abg abh abr abu ad- ada adb add ade adg adh adr adu aea aeb aed aee aeg aeh aer aeu ag- aga agb agd age agg agh agr agu aha ahb ahd ahe ahg ahh ahr ahu ar- ara arb ard are arg arh arr aru au- aua aub aud aue aug auh aur b-u baa bab bad bae bag bah bar bau bba bbb bbd bbe bbg bbh bbr bbu bda bdb bdd bde bdg bdh bdr bdu be- bea beb bed bee beg beh ber beu bga bgb bgd bge bgg bgh bgr bgu bha bhb bhd bhe bhg bhh bhr bhu bra brb brd bre brg brh brr bru bua bub bud bue bug buh bur buu daa dab dad dae dag dah dar dau dba dbb dbd dbe dbg dbh dbr dbu dda ddb ddd dde ddg ddh ddr ddu de- dea deb ded dee deg deh der deu dga dgd dge dgg dgh dgr dgu dh- dha dhb dhd dhe dhh dhr dhu dra drb drd dre drg drr dru dua dub dud due dug duh dur eaa eab ead eae eag eah ear eau eba ebb ebd ebe ebg ebh ebr ebu ed- eda edb edd ede edg edh edr edu eea eeb eed eee eeg eer ega egb egd ege egg egh egr egu eha ehb ehd ehe ehg ehh ehr ehu era erb erd ere erg erh err eru eu- eua eub eud eue eug eur g-d gaa gab gad gae gag gah gar gau gba gbd gbe gbg gbh gbr gbu gda gdb gdd gde gdh gdr gdu ge- gea geb ged gee geg geh ger geu gga ggb ggd ggg ggh ggr ggu gha ghb ghd ghe ghg ghh ghr gra grb grd gre grg grh grr gru gu- gua gub gud gue gug gur guu haa hab had hae hag hah har hau hba hbb hbd hbe hbg hbh hbr hbu hda hdb hdd hde hdg hdh hdr hdu he- hea heb hed hee heg heh her heu hga hgb hge hgg hgh hgr hgu hha hhb hhd hhe hhg hhh hhr hhu hr- hra hrb hrd hre hrg hrh hrr hru hua hub hud hue hug huh hur huu ra- raa rab rad rae rag rah rar rau rba rbb rbd rbe rbg rbh rbr rbu rda rdb rdd rde rdg rdh rdr rdu re- rea reb red ree reg reh rer reu rga rgb rgd rge rgg rgh rgr rh- rha rhb rhd rhe rhg rhh rhr rhu rra rrb rrd rrg rrh rrr rru rua rub rud rue rug ruh rur ruu ua- uaa uab uad uae uag uah uar uau uba ubb ube ubg ubh ubr ubu uda udb udd ude udg udr udu uea ueb ued uee ueg ueh uer uga ugb uge ugg ugh ugr ugu uha uhb uhd uhe uhh uhr uhu ur- ura urb urd ure urg urr uru uua uue uug uur uuu