-er a-a a-b aaa aab aad aae aag aan aar aau ab- aba abb abd abe abg abn abr abu ad- ada adb add ade adg adn adr adu aea aeb aed aee aeg aen aer aeu ag- aga agb agd age agg agn agr agu an- ana anb and ane ang ann anr anu ar- ara arb ard are arg arn arr aru au- aua aub aud aue aug aun aur b-u baa bab bad bae bag ban bar bau bba bbb bbd bbe bbg bbn bbr bbu bda bdb bdd bde bdg bdr bdu be- bea beb bed bee beg ben ber beu bga bgb bgd bge bgg bgn bgr bgu bna bnb bnd bne bng bnn bnr bnu bra brb brd bre brg brn brr bru bua bub bud bue bug bun bur buu daa dab dad dae dag dan dar dau dba dbb dbd dbe dbg dbn dbr dbu dda ddb ddd dde ddg ddn ddr ddu de- dea deb ded dee deg den der deu dga dgd dge dgg dgn dgr dgu dna dnb dnd dne dng dnn dnr dra drb drd dre drg drn drr dru dua dub dud due dug dun dur eaa eab ead eae eag ean ear eau eba ebb ebd ebe ebg ebn ebr ebu ed- eda edb edd ede edg edn edr edu eea eeb eed eee eeg een eer ega egb egd ege egg egn egr egu en- ena enb end ene eng enn enr enu era erb erd ere erg ern err eru eu- eua eub eud eue eug eun eur g-d gaa gab gad gae gag gan gar gau gba gbd gbe gbg gbn gbr gbu gda gdb gdd gde gdn gdr gdu ge- gea geb ged gee geg gen ger geu gga ggb ggd ggg ggn ggr ggu gna gnb gnd gne gnn gnr gnu gra grb grd gre grg grn grr gru gu- gua gub gud gue gug gun gur guu naa nab nad nae nag nan nar nau nba nbb nbd nbe nbg nbn nbr nbu nda ndb ndd nde ndg ndn ndr ndu ne- nea neb ned nee neg nen ner neu nga ngb ngd nge ngg ngn ngu nna nnb nne nng nnn nnu nra nrb nrd nre nrg nrn nrr nru nua nub nud nue nug nun nur nuu ra- raa rab rad rae rag ran rar rau rba rbb rbd rbe rbg rbn rbr rbu rda rdb rdd rde rdg rdn rdr rdu re- rea reb red ree reg ren rer reu rga rgb rgd rge rgg rgn rgr rna rnb rnd rng rnn rnr rnu rra rrb rrd rrg rrn rrr rru rua rub rud rue rug run rur ruu ua- uaa uab uad uae uag uan uar uau uba ubb ube ubg ubn ubr ubu uda udb udd ude udg udn udr udu uea ueb ued uee ueg uen uer uga ugb uge ugg ugn ugr ugu un- una unb und une ung unn unr unu ur- ura urb urd ure urg urn urr uru uua uue uug uun uur uuu