a-a a-b a-c aaa aab aac aae aaj aak ab- aba abb abc abe abj abk ac- aca acb acc ace acj ack aea aeb aec aee aej aek aja ajb ajc aje ajj ajk aka akb akc ake akj akk baa bab bac bae baj bak bba bbb bbc bbe bbk bca bcb bcc bce bcj bck be- bea beb bec bee bek bja bjc bjj bjk bka bkb bkc bke bkk c-- c-j caa cab cac cae caj cak cba cbb cbc cbe cbj cbk cca ccb ccc cce ccj cck ce- cea ceb cec cee cej cek cja cjb cjc cjk cka ckb ckc eaa eab eac eae eaj eak eba ebb ebc ebe ebj ebk ec- eca ecb ecc ece ecj eck eea eeb eec eee eek eja ejc eka ekb ekc eke jaa jab jac jae jaj jak jba jbc jbj jbk jca jcb jcc jce jck jea jeb jec jee jej jek jja jjb jjc jjj jjk jka jkb jkk ka- kaa kab kac kae kaj kak kba kbb kbc kbe kbk kca kcb kcc kce kck ke- kea keb kec kee kek kjb kjc kje kkb kkc kke kkk