-er -ey b-u bbb bbc bbd bbe bbr bbs bbt bbu bby bcb bcc bcd bce bcr bcs bct bcu bcy bdb bdc bdd bde bdr bds bdt bdu bdy be- beb bec bed bee ber bes bet beu bey brb brd bre brr brs brt bru bry bsb bsc bsd bse bsr bss bst bsu bsy btb btc btd bte btr bts btt btu bty bub buc bud bue bur bus but buu buy by- byc byd bye byr bys byt byu c-- cbb cbc cbd cbe cbr cbs cbt cbu cby ccb ccc ccd cce ccr ccs cct ccu cdb cdc cdd cde cdr cds cdt cdu cdy ce- ceb cec ced cee cer ces cet ceu cey crb crc crd cre crr crs crt cru cry csb csc csd cse csr css cst csu csy ctb ctc ctd cte ctr cts ctt ctu cty cub cuc cud cue cur cus cut cuu cuy cyb cyc cyd cye cyr cys cyt dbb dbc dbd dbe dbr dbs dbt dbu dby dcb dcc dcd dce dcr dcs dct dcu ddb ddc ddd dde ddr dds ddt ddu ddy de- deb dec ded dee der des det deu dey drb drc drd dre drr drs drt dru dry dsb dsc dsd dse dsr dss dst dsu dsy dtb dtc dtd dte dtr dts dtt dtu dty dub duc dud due dur dus dut duy dy- dyb dyc dyd dye dyr dys dyu dyy ebb ebc ebd ebe ebr ebs ebt ebu eby ec- ecb ecc ecd ece ecr ecs ect ecu ed- edb edc edd ede edr eds edt edu edy eeb eec eed eee eer ees eet eey erb erc erd ere err ers ert eru ery es- esb esc esd ese esr ess est esu esy etb etc etd ete etr ets ett etu ety eu- eub euc eud eue eur eus eut eyc eyd eye eyr eys eyt rbb rbc rbd rbe rbr rbs rbt rbu rcb rcc rcd rce rcr rcs rct rcu rdb rdc rdd rde rdr rds rdt rdu rdy re- reb rec red ree rer res ret reu rey rrb rrc rrd rrr rrs rrt rru rsb rsc rsd rse rsr rss rst rsu rtb rtc rtd rte rtr rts rtt rtu rty rub ruc rud rue rur rus rut ruu ruy ry- ryc ryd rye ryr rys ryu ryy sbb sbc sbd sbe sbr sbs sbt sbu sby scb scc scd sce scr scs sct scu sdb sdc sdd sde sdr sds sdt sdu sdy se- seb sec sed see ser ses set seu sey sr- srb src srd sre srr srs srt sry ss- ssb ssc ssd sse ssr sss sst ssu stb stc std ste str sts stt stu sty sub suc sud sue sur sus sut suu suy sy- syb syc syd sye syr sys syt syu tbb tbc tbd tbe tbr tbs tbt tbu tcb tcc tcd tce tcr tcs tct tcu tdb tdc tdd tde tdr tds tdt tdu tdy te- teb tec ted tee ter tes tet teu tey trb trc trd tre trr trs trt tru try tsb tsc tsd tse tsr tss tst tsu tsy ttb ttc ttd tte ttr tts ttt ttu tty tub tuc tud tue tur tus tut tuu tuy tyc tyd tye tyr tys tyt ubb ubc ube ubr ubs ubt ubu uby ucb ucc ucd uce ucr ucs uct ucu udb udc udd ude udr uds udt udu ueb uec ued uee uer ues uet uey ur- urb urc urd ure urr urs urt uru ury usb usc usd use usr uss ust usu utb utc utd ute utr uts utt utu uty uuc uue uur uus uut uuu uyc uys uyu ybc ybe ybr ybs yby ycc ycd yce ycs ycu ycy yde yds ydt ydy yeb yec yed yee yer yes yet yey yrc yre yrs yrt yru ysb ysc yse ysr yss yst ysu ysy ytc ytd yte ytr yts ytt ytu yud yue yur yus yut yuu yuy yyb yyc yye yys yyt yyu yyy