-er a-a a-b aaa aab aae aaf aaj aar ab- aba abb abe abf abj abr aea aeb aee aef aej aer af- afa afb afe aff afj afr aja ajb aje ajf ajj ajr ar- ara arb are arf arj arr baa bab bae baf baj bar bba bbb bbe bbf bbr be- bea beb bee bef ber bfa bfb bfe bff bfj bfr bja bjf bjj bjr bra brb bre brf brj brr eaa eab eae eaf eaj ear eba ebb ebe ebf ebj ebr eea eeb eee eef eer ef- efa efb efe eff efr eja ejf era erb ere erf err faa fab fae faf faj far fba fbb fbe fbf fbr fea feb fee fef fer ffa ffe fff ffr fja fjb fra frb fre frf frj frr jaa jab jae jaf jaj jar jba jbf jbj jbr jea jeb jee jef jej jer jfa jfb jfe jff jfj jfr jja jjb jjf jjj jjr jra jrb jrf jrr ra- raa rab rae raf raj rar rba rbb rbe rbf rbr re- rea reb ree ref rer rfa rfb rfe rff rfj rfr rja rjf rjr rra rrb rrf rrr