a-a a-b aaa aab aad aaj aar ab- aba abb abd abj abr ad- ada adb add adj adr aja ajb ajd ajj ajr ar- ara arb ard arj arr baa bab bad baj bar bba bbb bbd bbr bda bdb bdd bdj bdr bja bjd bjj bjr bra brb brd brj brr daa dab dad daj dar dba dbb dbd dbr dda ddb ddd ddr dj- dja djb djd dra drb drd drj drr j-d jaa jab jad jaj jar jba jbj jbr jda jdb jdr jja jjb jjj jjr jra jrb jrr ra- raa rab rad raj rar rba rbb rbd rbr rda rdb rdd rdj rdr rja rjr rra rrb rrd rrr