-er -ey b-u bbb bbe bbk bbr bbt bbu bby be- beb bee bek ber bet beu bey bkb bke bkk bkr bkt brb bre brk brr brt bru bry btb bte btk btr btt btu bty bub bue buk bur but buu buy by- bye byk byr byt byu ebb ebe ebk ebr ebt ebu eby eeb eee eek eer eet eey ekb eke ekr ekt eku eky erb ere erk err ert eru ery etb ete etk etr ett etu ety eu- eub eue eur eut eye eyr eyt k-t kbb kbe kbk kbr kbu ke- keb kee kek ker ket key kkb kke kkk kkr kkt kku kky krk krr krt kru kry ktb kte ktk ktr ktt ktu kub kue kuk kur kut kuu kuy kye kyr kyt kyu rbb rbe rbk rbr rbt rbu re- reb ree rek rer ret reu rey rkb rke rkk rkt rku rky rrb rrk rrr rrt rru rtb rte rtk rtr rtt rtu rty rub rue ruk rur rut ruu ruy ry- rye ryk ryr ryu ryy tbb tbe tbk tbr tbt tbu te- teb tee tek ter tet teu tey tkb tke tkk tkr tkt tky trb tre trk trr trt tru try ttb tte ttk ttr ttt ttu tty tub tue tuk tur tut tuu tuy tye tyr tyt ubb ube ubk ubr ubt ubu uby ueb uee uer uet uey ukb uke ukk ukr uku ur- urb ure urk urr urt uru ury utb ute utk utr utt utu uty uue uur uut uuu uyu ybe ybr yby yeb yee yek yer yet yey ykk yre yrt yru yte ytk ytr ytt ytu yue yuk yur yut yuu yuy yyb yye yyt yyu yyy