-er -ey a-a a-b a-t aaa aab aae aak aar aat aay ab- aba abb abe abk abr abt aby aea aeb aee aek aer aet aey aka akb ake akk akr ar- ara arb are ark arr art ary at- ata atb ate atr att ay- aya aye ayk ayr ayt baa bab bae bak bar bat bay bba bbb bbe bbk bbr bbt bby be- bea beb bee bek ber bet bey bka bkb bke bkk bkr bkt bra brb bre brk brr brt bry bta btb bte btk btr btt bty by- bya bye byk byr byt eaa eab eae eak ear eat eba ebb ebe ebk ebr ebt eby eea eeb eee eek eer eet eey eka ekb eke ekr ekt eky era erb ere erk err ert ery eta etb ete etk etr ett ety eya eye eyr eyt k-t ka- kaa kab kae kak kar kat kay kba kbb kbe kbk kbr ke- kea keb kee kek ker ket key kkb kke kkk kkr kkt kky kra krk krr krt kry kta ktb kte ktk ktr ktt kya kye kyr kyt ra- raa rab rae rak rar rat ray rba rbb rbe rbk rbr rbt re- rea reb ree rek rer ret rey rkb rke rkk rkt rky rra rrb rrk rrr rrt rta rtb rte rtk rtr rtt rty ry- rya rye ryk ryr ryy taa tab tae tak tar tat tay tba tbb tbe tbk tbr tbt te- tea teb tee tek ter tet tey tka tkb tke tkk tkr tkt tky tra trb tre trk trr trt try tta ttb tte ttk ttr ttt tty tya tye tyr tyt yaa yab yae yak yar yat yay ybe ybr yby yea yeb yee yek yer yet yey yka ykk yra yre yrt yta yte ytk ytr ytt yyb yye yyt yyy