-er -ey a-a a-b a-c aaa aab aac aad aae aag aar aay ab- aba abb abc abd abe abg abr aby ac- aca acb acc acd ace acg acr acy ad- ada adb adc add ade adg adr ady aea aeb aec aed aee aeg aer aey ag- aga agb agc agd age agg agr agy ar- ara arb arc ard are arg arr ary ay- aya ayc ayd aye ayr baa bab bac bad bae bag bar bay bba bbb bbc bbd bbe bbg bbr bby bca bcb bcc bcd bce bcg bcr bcy bda bdb bdc bdd bde bdg bdr bdy be- bea beb bec bed bee beg ber bey bga bgb bgc bgd bge bgg bgr bra brb brd bre brg brr bry by- bya byc byd bye byg byr c-- caa cab cac cad cae cag car cay cba cbb cbc cbd cbe cbg cbr cby cca ccb ccc ccd cce ccg ccr cda cdb cdc cdd cde cdg cdr cdy ce- cea ceb cec ced cee ceg cer cey cga cgb cgc cgd cge cgg cgr cgy cra crb crc crd cre crg crr cry cya cyb cyc cyd cye cyg cyr daa dab dac dad dae dag dar day dba dbb dbc dbd dbe dbg dbr dby dca dcb dcc dcd dce dcg dcr dda ddb ddc ddd dde ddg ddr ddy de- dea deb dec ded dee deg der dey dga dgc dgd dge dgg dgr dra drb drc drd dre drg drr dry dy- dya dyb dyc dyd dye dyr dyy eaa eab eac ead eae eag ear eba ebb ebc ebd ebe ebg ebr eby ec- eca ecb ecc ecd ece ecg ecr ed- eda edb edc edd ede edg edr edy eea eeb eec eed eee eeg eer eey ega egb egc egd ege egg egr egy era erb erc erd ere erg err ery eya eyc eyd eye eyr g-d gaa gab gac gad gae gag gar gay gba gbc gbd gbe gbg gbr gby gca gcb gcc gcd gce gcg gcr gda gdb gdc gdd gde gdr ge- gea geb gec ged gee geg ger gey gga ggb ggc ggd ggg ggr gra grb grc grd gre grg grr gry gy- gya gyb gyd gye gyr ra- raa rab rac rad rae rag rar ray rba rbb rbc rbd rbe rbg rbr rca rcb rcc rcd rce rcg rcr rda rdb rdc rdd rde rdg rdr rdy re- rea reb rec red ree reg rer rey rga rgb rgc rgd rge rgg rgr rra rrb rrc rrd rrg rrr ry- rya ryc ryd rye ryg ryr ryy yaa yab yac yad yae yag yar yay ybc ybe ybg ybr yby yca ycc ycd yce ycy yda yde ydg ydy yea yeb yec yed yee yeg yer yey yga ygc yra yrc yre yrg yyb yyc yye yyg yyy