a-a a-b a-q a-t aaa aab aad aaq aar aat ab- aba abb abd abq abr abt ad- ada adb add adq adr adt aqa aqr aqt ar- ara arb ard arq arr art at- ata atb atd atr att baa bab bad baq bar bat bba bbb bbd bbq bbr bbt bda bdb bdd bdq bdr bdt bqd bqt bra brb brd brq brr brt bta btb btd btq btr btt daa dab dad daq dar dat dba dbb dbd dbq dbr dbt dda ddb ddd ddq ddr ddt dqa dra drb drd drq drr drt dta dtb dtd dtr dtt qaa qad qar qat qba qbd qbq qda qdb qdr qdt qqq qra qrb qrt qta qtd qtq qtr ra- raa rab rad raq rar rat rba rbb rbd rbr rbt rda rdb rdd rdr rdt rra rrb rrd rrq rrr rrt rta rtb rtd rtq rtr rtt taa tab tad taq tar tat tba tbb tbd tbr tbt tda tdb tdd tdr tdt tra trb trd trq trr trt tta ttb ttd ttr ttt