-er a-a a-b a-t aaa aab aad aae aag aao aar aat aau ab- aba abb abd abe abg abo abr abt abu ad- ada adb add ade adg ado adr adt adu aea aeb aed aee aeg aeo aer aet aeu ag- aga agb agd age agg ago agr agt agu aoa aob aod aoe aog aoo aor aot aou ar- ara arb ard are arg aro arr art aru at- ata atb atd ate atg ato atr att atu au- aua aub aud aue aug auo aur aut b-u baa bab bad bae bag bao bar bat bau bba bbb bbd bbe bbg bbo bbr bbt bbu bda bdb bdd bde bdg bdo bdr bdt bdu be- bea beb bed bee beg beo ber bet beu bga bgb bgd bge bgg bgo bgr bgt bgu boa bob bod boe bog boo bor bot bou bra brb brd bre brg bro brr brt bru bta btb btd bte btg bto btr btt btu bua bub bud bue bug buo bur but buu daa dab dad dae dag dao dar dat dau dba dbb dbd dbe dbg dbo dbr dbt dbu dda ddb ddd dde ddg ddo ddr ddt ddu de- dea deb ded dee deg deo der det deu dga dgd dge dgg dgr dgt dgu doa dob dod doe dog doo dor dot dou dra drb drd dre drg dro drr drt dru dta dtb dtd dte dtg dto dtr dtt dtu dua dub dud due dug duo dur dut eaa eab ead eae eag eao ear eat eau eba ebb ebd ebe ebg ebo ebr ebt ebu ed- eda edb edd ede edg edo edr edt edu eea eeb eed eee eeg eeo eer eet ega egb egd ege egg ego egr egt egu eo- eoa eob eod eoe eog eoo eor eot eou era erb erd ere erg ero err ert eru eta etb etd ete etg eto etr ett etu eu- eua eub eud eue eug eur eut g-d gaa gab gad gae gag gao gar gat gau gba gbd gbe gbg gbo gbr gbt gbu gda gdb gdd gde gdo gdr gdt gdu ge- gea geb ged gee geg geo ger get geu gga ggb ggd ggg ggo ggr ggt ggu goa gob god goe gog goo gor got gou gra grb grd gre grg gro grr grt gru gta gtb gtd gte gtg gto gtr gtt gtu gu- gua gub gud gue gug guo gur gut guu oaa oab oad oae oag oao oar oat oau ob- oba obb obd obe obg obo obr obt obu oda odb odd ode odg odo odr odt odu oea oeb oed oee oeg oeo oer oet oga ogd oge ogg ogo ogt oo- ooa oob ood oog ooo oor oot or- ora orb ord ore org oro orr ort oru ot- ota otb otd ote otg oto otr ott otu ou- oua oud oue ouo our out ra- raa rab rad rae rag rao rar rat rau rba rbb rbd rbe rbg rbo rbr rbt rbu rda rdb rdd rde rdg rdo rdr rdt rdu re- rea reb red ree reg reo rer ret reu rga rgb rgd rge rgg rgo rgr rgt roa rob rod roe rog roo ror rot rou rra rrb rrd rrg rrr rrt rru rta rtb rtd rte rtg rto rtr rtt rtu rua rub rud rue rug ruo rur rut ruu taa tab tad tae tag tao tar tat tau tba tbb tbd tbe tbg tbo tbr tbt tbu tda tdb tdd tde tdg tdo tdr tdt tdu te- tea teb ted tee teg teo ter tet teu tga tgb tge tgg tgo tgr tgt tgu to- toa tob tod toe tog too tor tot tou tra trb trd tre trg tro trr trt tru tta ttb ttd tte ttg tto ttr ttt ttu tua tub tud tue tug tuo tur tut tuu ua- uaa uab uad uae uag uao uar uat uau uba ubb ube ubg ubo ubr ubt ubu uda udb udd ude udg udo udr udt udu uea ueb ued uee ueg uer uet uga ugb uge ugg ugo ugr ugt ugu uoa uob uod uoe uog uoo uor uot ur- ura urb urd ure urg uro urr urt uru uta utb utd ute uto utr utt utu uua uue uug uur uut uuu