-er a-a a-b a-t aaa aab aae aag aak aao aar aat aau ab- aba abb abe abg abk abo abr abt abu aea aeb aee aeg aek aeo aer aet aeu ag- aga agb age agg agk ago agr agt agu aka akb ake akg akk ako akr aku aoa aob aoe aog aok aoo aor aot aou ar- ara arb are arg ark aro arr art aru at- ata atb ate atg ato atr att atu au- aua aub aue aug auk auo aur aut b-u baa bab bae bag bak bao bar bat bau bba bbb bbe bbg bbk bbo bbr bbt bbu be- bea beb bee beg bek beo ber bet beu bga bgb bge bgg bgk bgo bgr bgt bgu bka bkb bke bkg bkk bko bkr bkt boa bob boe bog bok boo bor bot bou bra brb bre brg brk bro brr brt bru bta btb bte btg btk bto btr btt btu bua bub bue bug buk buo bur but buu eaa eab eae eag eak eao ear eat eau eba ebb ebe ebg ebk ebo ebr ebt ebu eea eeb eee eeg eek eeo eer eet ega egb ege egg ego egr egt egu eka ekb eke ekg eko ekr ekt eku eo- eoa eob eoe eog eok eoo eor eot eou era erb ere erg erk ero err ert eru eta etb ete etg etk eto etr ett etu eu- eua eub eue eug eur eut gaa gab gae gag gak gao gar gat gau gba gbe gbg gbk gbo gbr gbt gbu ge- gea geb gee geg gek geo ger get geu gga ggb ggg ggo ggr ggt ggu gka gkb gko gkt goa gob goe gog gok goo gor got gou gra grb gre grg grk gro grr grt gru gta gtb gte gtg gtk gto gtr gtt gtu gu- gua gub gue gug guk guo gur gut guu k-t ka- kaa kab kae kag kak kao kar kat kau kba kbb kbe kbk kbo kbr kbu ke- kea keb kee keg kek keo ker ket kga kgb kgo kgu kkb kke kkk kkr kkt kku koa kob koe kog kok koo kor kot kou kra krg krk kro krr krt kru kta ktb kte ktg ktk kto ktr ktt ktu kub kue kug kuk kur kut kuu oaa oab oae oag oak oao oar oat oau ob- oba obb obe obg obk obo obr obt obu oea oeb oee oeg oeo oer oet oga oge ogg ogo ogt oka okb oke okg okk oko okr oku oo- ooa oob oog ook ooo oor oot or- ora orb ore org ork oro orr ort oru ot- ota otb ote otg otk oto otr ott otu ou- oua oue ouk ouo our out ra- raa rab rae rag rak rao rar rat rau rba rbb rbe rbg rbk rbo rbr rbt rbu re- rea reb ree reg rek reo rer ret reu rga rgb rge rgg rgk rgo rgr rgt rkb rke rkg rkk rko rkt rku roa rob roe rog rok roo ror rot rou rra rrb rrg rrk rrr rrt rru rta rtb rte rtg rtk rto rtr rtt rtu rua rub rue rug ruk ruo rur rut ruu taa tab tae tag tak tao tar tat tau tba tbb tbe tbg tbk tbo tbr tbt tbu te- tea teb tee teg tek teo ter tet teu tga tgb tge tgg tgk tgo tgr tgt tgu tka tkb tke tkg tkk tko tkr tkt to- toa tob toe tog tok too tor tot tou tra trb tre trg trk tro trr trt tru tta ttb tte ttg ttk tto ttr ttt ttu tua tub tue tug tuk tuo tur tut tuu ua- uaa uab uae uag uak uao uar uat uau uba ubb ube ubg ubk ubo ubr ubt ubu uea ueb uee ueg uer uet uga ugb uge ugg ugk ugo ugr ugt ugu uka ukb uke ukk ukr uku uoa uob uoe uog uok uoo uor uot ur- ura urb ure urg urk uro urr urt uru uta utb ute utk uto utr utt utu uua uue uug uur uut uuu