a-a a-b aaa aab aad aaj aak ab- aba abb abd abj abk ad- ada adb add adj adk aja ajb ajd ajj ajk aka akb akd akj akk baa bab bad baj bak bba bbb bbd bbk bda bdb bdd bdj bdk bja bjd bjj bjk bka bkb bkk daa dab dad daj dak dba dbb dbd dbk dda ddb ddd ddk dj- dja djb djd djk dka dkb dkk j-d jaa jab jad jaj jak jba jbj jbk jda jdb jja jjb jjj jjk jka jkb jkk ka- kaa kab kad kaj kak kba kbb kbd kbk kda kdb kdk kjb kkb kkk