-ey a-a a-b a-c aaa aab aac aae aaj aak aay ab- aba abb abc abe abj abk aby ac- aca acb acc ace acj ack acy aea aeb aec aee aej aek aey aja ajb ajc aje ajj ajk ajy aka akb akc ake akj akk ay- aya ayc aye ayk baa bab bac bae baj bak bay bba bbb bbc bbe bbk bby bca bcb bcc bce bcj bck bcy be- bea beb bec bee bek bey bja bjc bjj bjk bka bkb bkc bke bkk by- bya byc bye byj byk c-- c-j caa cab cac cae caj cak cay cba cbb cbc cbe cbj cbk cby cca ccb ccc cce ccj cck ce- cea ceb cec cee cej cek cey cja cjb cjc cjk cka ckb ckc cky cya cyb cyc cye cyk eaa eab eac eae eaj eak eba ebb ebc ebe ebj ebk eby ec- eca ecb ecc ece ecj eck eea eeb eec eee eek eey eja ejc eka ekb ekc eke eky eya eyc eye jaa jab jac jae jaj jak jay jba jbc jbj jbk jca jcb jcc jce jck jea jeb jec jee jej jek jey jja jjb jjc jjj jjk jjy jka jkb jkk jyj ka- kaa kab kac kae kaj kak kay kba kbb kbc kbe kbk kca kcb kcc kce kck ke- kea keb kec kee kek key kjb kjc kje kkb kkc kke kkk kky kya kyc kye yaa yab yac yae yak yay ybc ybe yby yca ycc yce ycy yea yeb yec yee yek yey yka ykk yyb yyc yye yyy