-er a-a a-b a-t aaa aab aae aag aaj aao aar aat aau ab- aba abb abe abg abj abo abr abt abu aea aeb aee aeg aej aeo aer aet aeu ag- aga agb age agg agj ago agr agt agu aja ajb aje ajj ajo ajr ajt aju aoa aob aoe aog aoj aoo aor aot aou ar- ara arb are arg arj aro arr art aru at- ata atb ate atg ato atr att atu au- aua aub aue aug auj auo aur aut b-u baa bab bae bag baj bao bar bat bau bba bbb bbe bbg bbo bbr bbt bbu be- bea beb bee beg beo ber bet beu bga bgb bge bgg bgo bgr bgt bgu bja bjg bjj bjr bjt bju boa bob boe bog boj boo bor bot bou bra brb bre brg brj bro brr brt bru bta btb bte btg bto btr btt btu bua bub bue bug buj buo bur but buu eaa eab eae eag eaj eao ear eat eau eba ebb ebe ebg ebj ebo ebr ebt ebu eea eeb eee eeg eeo eer eet ega egb ege egg ego egr egt egu eja ejo ejt eju eo- eoa eob eoe eog eoo eor eot eou era erb ere erg ero err ert eru eta etb ete etg etj eto etr ett etu eu- eua eub eue eug euj eur eut gaa gab gae gag gaj gao gar gat gau gba gbe gbg gbj gbo gbr gbt gbu ge- gea geb gee geg geo ger get geu gga ggb ggg ggj ggo ggr ggt ggu gja gje gjg gjr gjt goa gob goe gog goo gor got gou gra grb gre grg grj gro grr grt gru gta gtb gte gtg gto gtr gtt gtu gu- gua gub gue gug guj guo gur gut guu jaa jab jae jag jaj jao jar jat jau jba jbg jbj jbo jbr jbt jbu jea jeb jee jeg jej jeo jer jet jeu jga jgb jge jgo jgr jgt jgu jja jjb jjg jjj jjr jju joa job joe jog joj joo jor jot jou jra jrb jrg jro jrr jrt jta jtb jte jtg jtr jtt jtu jub jue jug juo jur jut oaa oab oae oag oaj oao oar oat oau ob- oba obb obe obg obj obo obr obt obu oea oeb oee oeg oeo oer oet oga oge ogg ogo ogt oja ojb oje ojo oju oo- ooa oob oog ooo oor oot or- ora orb ore org oro orr ort oru ot- ota otb ote otg oto otr ott otu ou- oua oue ouo our out ra- raa rab rae rag raj rao rar rat rau rba rbb rbe rbg rbo rbr rbt rbu re- rea reb ree reg reo rer ret reu rga rgb rge rgg rgo rgr rgt rja rjg rjr roa rob roe rog roj roo ror rot rou rra rrb rrg rrr rrt rru rta rtb rte rtg rtj rto rtr rtt rtu rua rub rue rug ruo rur rut ruu taa tab tae tag taj tao tar tat tau tba tbb tbe tbg tbj tbo tbr tbt tbu te- tea teb tee teg tej teo ter tet teu tga tgb tge tgg tgo tgr tgt tgu tje tjo tjr tju to- toa tob toe tog toj too tor tot tou tra trb tre trg tro trr trt tru tta ttb tte ttg tto ttr ttt ttu tua tub tue tug tuj tuo tur tut tuu ua- uaa uab uae uag uaj uao uar uat uau uba ubb ube ubg ubo ubr ubt ubu uea ueb uee ueg uer uet uga ugb uge ugg ugo ugr ugt ugu ujo uoa uob uoe uog uoj uoo uor uot ur- ura urb ure urg uro urr urt uru uta utb ute utj uto utr utt utu uua uue uug uur uut uuu