-er -ey a-a a-b a-t aaa aab aad aae aao aar aat aay ab- aba abb abd abe abo abr abt aby ad- ada adb add ade ado adr adt ady aea aeb aed aee aeo aer aet aey aoa aob aod aoe aoo aor aot ar- ara arb ard are aro arr art ary at- ata atb atd ate ato atr att ay- aya ayd aye ayo ayr ayt baa bab bad bae bao bar bat bay bba bbb bbd bbe bbo bbr bbt bby bda bdb bdd bde bdo bdr bdt bdy be- bea beb bed bee beo ber bet bey boa bob bod boe boo bor bot boy bra brb brd bre bro brr brt bry bta btb btd bte bto btr btt bty by- bya byd bye byo byr byt daa dab dad dae dao dar dat day dba dbb dbd dbe dbo dbr dbt dby dda ddb ddd dde ddo ddr ddt ddy de- dea deb ded dee deo der det dey doa dob dod doe doo dor dot doy dra drb drd dre dro drr drt dry dta dtb dtd dte dto dtr dtt dty dy- dya dyb dyd dye dyo dyr dyy eaa eab ead eae eao ear eat eba ebb ebd ebe ebo ebr ebt eby ed- eda edb edd ede edo edr edt edy eea eeb eed eee eeo eer eet eey eo- eoa eob eod eoe eoo eor eot era erb erd ere ero err ert ery eta etb etd ete eto etr ett ety eya eyd eye eyo eyr eyt oaa oab oad oae oao oar oat ob- oba obb obd obe obo obr obt oby oda odb odd ode odo odr odt oea oeb oed oee oeo oer oet oey oo- ooa oob ood ooo oor oot or- ora orb ord ore oro orr ort ory ot- ota otb otd ote oto otr ott oya oyd oye oyo ra- raa rab rad rae rao rar rat ray rba rbb rbd rbe rbo rbr rbt rda rdb rdd rde rdo rdr rdt rdy re- rea reb red ree reo rer ret rey roa rob rod roe roo ror rot roy rra rrb rrd rrr rrt rta rtb rtd rte rto rtr rtt rty ry- rya ryd rye ryo ryr ryy taa tab tad tae tao tar tat tay tba tbb tbd tbe tbo tbr tbt tda tdb tdd tde tdo tdr tdt tdy te- tea teb ted tee teo ter tet tey to- toa tob tod toe too tor tot toy tra trb trd tre tro trr trt try tta ttb ttd tte tto ttr ttt tty tya tyd tye tyo tyr tyt yaa yab yad yae yao yar yat yay ybe ybr yby yda yde ydo ydt ydy yea yeb yed yee yeo yer yet yey yob yod yoe yoo yor yot yoy yra yre yro yrt yta ytd yte yto ytr ytt yyb yye yyt yyy