-er -ey a-a a-b a-c a-t aaa aab aac aae aar aas aat aau aay ab- aba abb abc abe abr abs abt abu aby ac- aca acb acc ace acr acs act acu acy aea aeb aec aee aer aes aet aeu aey ar- ara arb arc are arr ars art aru ary as- asa asb asc ase asr ass ast asu asy at- ata atb atc ate atr ats att atu au- aua aub auc aue aur aus aut ay- aya ayc aye ayr ays ayt ayu b-u baa bab bac bae bar bas bat bau bay bba bbb bbc bbe bbr bbs bbt bbu bby bca bcb bcc bce bcr bcs bct bcu bcy be- bea beb bec bee ber bes bet beu bey bra brb bre brr brs brt bru bry bsa bsb bsc bse bsr bss bst bsu bsy bta btb btc bte btr bts btt btu bty bua bub buc bue bur bus but buu buy by- bya byc bye byr bys byt byu c-- caa cab cac cae car cas cat cau cay cba cbb cbc cbe cbr cbs cbt cbu cby cca ccb ccc cce ccr ccs cct ccu ce- cea ceb cec cee cer ces cet ceu cey cra crb crc cre crr crs crt cru cry csa csb csc cse csr css cst csu csy cta ctb ctc cte ctr cts ctt ctu cty cua cub cuc cue cur cus cut cuu cuy cya cyb cyc cye cyr cys cyt eaa eab eac eae ear eas eat eau eba ebb ebc ebe ebr ebs ebt ebu eby ec- eca ecb ecc ece ecr ecs ect ecu eea eeb eec eee eer ees eet eey era erb erc ere err ers ert eru ery es- esa esb esc ese esr ess est esu esy eta etb etc ete etr ets ett etu ety eu- eua eub euc eue eur eus eut eya eyc eye eyr eys eyt ra- raa rab rac rae rar ras rat rau ray rba rbb rbc rbe rbr rbs rbt rbu rca rcb rcc rce rcr rcs rct rcu re- rea reb rec ree rer res ret reu rey rra rrb rrc rrr rrs rrt rru rsa rsb rsc rse rsr rss rst rsu rta rtb rtc rte rtr rts rtt rtu rty rua rub ruc rue rur rus rut ruu ruy ry- rya ryc rye ryr rys ryu ryy saa sab sac sae sar sas sat sau say sba sbb sbc sbe sbr sbs sbt sbu sby sca scb scc sce scr scs sct scu se- sea seb sec see ser ses set seu sey sr- sra srb src sre srr srs srt sry ss- ssa ssb ssc sse ssr sss sst ssu sta stb stc ste str sts stt stu sty sua sub suc sue sur sus sut suu suy sy- sya syb syc sye syr sys syt syu taa tab tac tae tar tas tat tau tay tba tbb tbc tbe tbr tbs tbt tbu tca tcb tcc tce tcr tcs tct tcu te- tea teb tec tee ter tes tet teu tey tra trb trc tre trr trs trt tru try tsa tsb tsc tse tsr tss tst tsu tsy tta ttb ttc tte ttr tts ttt ttu tty tua tub tuc tue tur tus tut tuu tuy tya tyc tye tyr tys tyt ua- uaa uab uac uae uar uas uat uau uay uba ubb ubc ube ubr ubs ubt ubu uby uca ucb ucc uce ucr ucs uct ucu uea ueb uec uee uer ues uet uey ur- ura urb urc ure urr urs urt uru ury usa usb usc use usr uss ust usu uta utb utc ute utr uts utt utu uty uua uuc uue uur uus uut uuu uyc uys uyu yaa yab yac yae yar yas yat yau yay ybc ybe ybr ybs yby yca ycc yce ycs ycu ycy yea yeb yec yee yer yes yet yey yra yrc yre yrs yrt yru ysa ysb ysc yse ysr yss yst ysu ysy yta ytc yte ytr yts ytt ytu yua yue yur yus yut yuu yuy yyb yyc yye yys yyt yyu yyy