-er -ey a-a a-b aaa aab aad aae aaf aar aay ab- aba abb abd abe abf abr aby ad- ada adb add ade adf adr ady aea aeb aed aee aef aer aey af- afa afb afd afe aff afr afy ar- ara arb ard are arf arr ary ay- aya ayd aye ayf ayr baa bab bad bae baf bar bay bba bbb bbd bbe bbf bbr bby bda bdb bdd bde bdf bdr bdy be- bea beb bed bee bef ber bey bfa bfb bfd bfe bff bfr bfy bra brb brd bre brf brr bry by- bya byd bye byf byr daa dab dad dae daf dar day dba dbb dbd dbe dbf dbr dby dda ddb ddd dde ddf ddr ddy de- dea deb ded dee def der dey dfa dfb dfd dfe dff dfr dra drb drd dre drr dry dy- dya dyb dyd dye dyr dyy eaa eab ead eae eaf ear eba ebb ebd ebe ebf ebr eby ed- eda edb edd ede edf edr edy eea eeb eed eee eef eer eey ef- efa efb efd efe eff efr era erb erd ere erf err ery eya eyd eye eyr faa fab fad fae faf far fay fba fbb fbd fbe fbf fbr fda fdb fdd fde fdf fdr fea feb fed fee fef fer fey ffa ffd ffe fff ffr ffy fra frb frd fre frf frr fry fy- fya fyb fye ra- raa rab rad rae raf rar ray rba rbb rbd rbe rbf rbr rda rdb rdd rde rdf rdr rdy re- rea reb red ree ref rer rey rfa rfb rfd rfe rff rfr rra rrb rrd rrf rrr ry- rya ryd rye ryf ryr ryy yaa yab yad yae yaf yar yay ybe ybf ybr yby yda yde ydy yea yeb yed yee yef yer yey yfa yfd yfe yff yfr yra yre yrf yyb yye yyf yyy