a-a a-b a-t aaa aab aad aak aar aat aau ab- aba abb abd abk abr abt abu ad- ada adb add adk adr adt adu aka akb akd akk akr aku ar- ara arb ard ark arr art aru at- ata atb atd atr att atu au- aua aub aud auk aur aut b-u baa bab bad bak bar bat bau bba bbb bbd bbk bbr bbt bbu bda bdb bdd bdk bdr bdt bdu bka bkb bkk bkr bkt bra brb brd brk brr brt bru bta btb btd btk btr btt btu bua bub bud buk bur but buu daa dab dad dak dar dat dau dba dbb dbd dbk dbr dbt dbu dda ddb ddd ddk ddr ddt ddu dka dkb dkk dkr dkt dku dra drb drd drk drr drt dru dta dtb dtd dtk dtr dtt dtu dua dub dud duk dur dut k-t ka- kaa kab kad kak kar kat kau kba kbb kbd kbk kbr kbu kda kdb kdk kdr kdt kdu kkb kkk kkr kkt kku kra krd krk krr krt kru kta ktb ktk ktr ktt ktu kub kud kuk kur kut kuu ra- raa rab rad rak rar rat rau rba rbb rbd rbk rbr rbt rbu rda rdb rdd rdr rdt rdu rkb rkk rkt rku rra rrb rrd rrk rrr rrt rru rta rtb rtd rtk rtr rtt rtu rua rub rud ruk rur rut ruu taa tab tad tak tar tat tau tba tbb tbd tbk tbr tbt tbu tda tdb tdd tdk tdr tdt tdu tka tkb tkk tkr tkt tra trb trd trk trr trt tru tta ttb ttd ttk ttr ttt ttu tua tub tud tuk tur tut tuu ua- uaa uab uad uak uar uat uau uba ubb ubk ubr ubt ubu uda udb udd udk udr udt udu uka ukb ukk ukr uku ur- ura urb urd urk urr urt uru uta utb utd utk utr utt utu uua uur uut uuu