a-a a-b a-t aaa aab aaj aar aat ab- aba abb abj abr abt aja ajb ajj ajr ajt ar- ara arb arj arr art at- ata atb atr att baa bab baj bar bat bba bbb bbr bbt bja bjj bjr bjt bra brb brj brr brt bta btb btr btt jaa jab jaj jar jat jba jbj jbr jbt jja jjb jjj jjr jra jrb jrr jrt jta jtb jtr jtt ra- raa rab raj rar rat rba rbb rbr rbt rja rjr rra rrb rrr rrt rta rtb rtj rtr rtt taa tab taj tar tat tba tbb tbj tbr tbt tjr tra trb trr trt tta ttb ttr ttt