a-a a-b a-t aaa aab aad aak aan aar aat aau ab- aba abb abd abk abn abr abt abu ad- ada adb add adk adn adr adt adu aka akb akd akk akn akr aku an- ana anb and ank ann anr ant anu ar- ara arb ard ark arn arr art aru at- ata atb atd atn atr att atu au- aua aub aud auk aun aur aut b-u baa bab bad bak ban bar bat bau bba bbb bbd bbk bbn bbr bbt bbu bda bdb bdd bdk bdr bdt bdu bka bkb bkk bkn bkr bkt bna bnb bnd bnk bnn bnr bnt bnu bra brb brd brk brn brr brt bru bta btb btd btk btn btr btt btu bua bub bud buk bun bur but buu daa dab dad dak dan dar dat dau dba dbb dbd dbk dbn dbr dbt dbu dda ddb ddd ddk ddn ddr ddt ddu dka dkb dkk dkr dkt dku dna dnb dnd dnk dnn dnr dnt dra drb drd drk drn drr drt dru dta dtb dtd dtk dtn dtr dtt dtu dua dub dud duk dun dur dut k-t ka- kaa kab kad kak kan kar kat kau kba kbb kbd kbk kbn kbr kbu kda kdb kdk kdr kdt kdu kkb kkk kkn kkr kkt kku kn- kna knd knk knn knr knt knu kra krd krk krn krr krt kru kta ktb ktk ktn ktr ktt ktu kub kud kuk kun kur kut kuu naa nab nad nak nan nar nat nau nba nbb nbd nbk nbn nbr nbt nbu nda ndb ndd ndk ndn ndr ndt ndu nka nkk nkn nkr nkt nku nna nnb nnk nnn nnt nnu nra nrb nrd nrk nrn nrr nrt nru nta ntb ntd ntk ntn ntr ntt ntu nua nub nud nuk nun nur nut nuu ra- raa rab rad rak ran rar rat rau rba rbb rbd rbk rbn rbr rbt rbu rda rdb rdd rdn rdr rdt rdu rkb rkk rkt rku rna rnb rnd rnn rnr rnt rnu rra rrb rrd rrk rrn rrr rrt rru rta rtb rtd rtk rtn rtr rtt rtu rua rub rud ruk run rur rut ruu taa tab tad tak tan tar tat tau tba tbb tbd tbk tbn tbr tbt tbu tda tdb tdd tdk tdn tdr tdt tdu tka tkb tkk tkr tkt tna tnb tnd tnk tnn tnr tnt tra trb trd trk trn trr trt tru tta ttb ttd ttk ttn ttr ttt ttu tua tub tud tuk tun tur tut tuu ua- uaa uab uad uak uan uar uat uau uba ubb ubk ubn ubr ubt ubu uda udb udd udk udn udr udt udu uka ukb ukk ukn ukr uku un- una unb und unk unn unr unt unu ur- ura urb urd urk urn urr urt uru uta utb utd utk utn utr utt utu uua uun uur uut uuu