a-a a-b a-t aaa aab aad aag aan aar aat aau ab- aba abb abd abg abn abr abt abu ad- ada adb add adg adn adr adt adu ag- aga agb agd agg agn agr agt agu an- ana anb and ang ann anr ant anu ar- ara arb ard arg arn arr art aru at- ata atb atd atg atn atr att atu au- aua aub aud aug aun aur aut b-u baa bab bad bag ban bar bat bau bba bbb bbd bbg bbn bbr bbt bbu bda bdb bdd bdg bdr bdt bdu bga bgb bgd bgg bgn bgr bgt bgu bna bnb bnd bng bnn bnr bnt bnu bra brb brd brg brn brr brt bru bta btb btd btg btn btr btt btu bua bub bud bug bun bur but buu daa dab dad dag dan dar dat dau dba dbb dbd dbg dbn dbr dbt dbu dda ddb ddd ddg ddn ddr ddt ddu dga dgd dgg dgn dgr dgt dgu dna dnb dnd dng dnn dnr dnt dra drb drd drg drn drr drt dru dta dtb dtd dtg dtn dtr dtt dtu dua dub dud dug dun dur dut g-d gaa gab gad gag gan gar gat gau gba gbd gbg gbn gbr gbt gbu gda gdb gdd gdn gdr gdt gdu gga ggb ggd ggg ggn ggr ggt ggu gna gnb gnd gnn gnr gnt gnu gra grb grd grg grn grr grt gru gta gtb gtd gtg gtn gtr gtt gtu gu- gua gub gud gug gun gur gut guu naa nab nad nag nan nar nat nau nba nbb nbd nbg nbn nbr nbt nbu nda ndb ndd ndg ndn ndr ndt ndu nga ngb ngd ngg ngn ngt ngu nna nnb nng nnn nnt nnu nra nrb nrd nrg nrn nrr nrt nru nta ntb ntd ntg ntn ntr ntt ntu nua nub nud nug nun nur nut nuu ra- raa rab rad rag ran rar rat rau rba rbb rbd rbg rbn rbr rbt rbu rda rdb rdd rdg rdn rdr rdt rdu rga rgb rgd rgg rgn rgr rgt rna rnb rnd rng rnn rnr rnt rnu rra rrb rrd rrg rrn rrr rrt rru rta rtb rtd rtg rtn rtr rtt rtu rua rub rud rug run rur rut ruu taa tab tad tag tan tar tat tau tba tbb tbd tbg tbn tbr tbt tbu tda tdb tdd tdg tdn tdr tdt tdu tga tgb tgg tgn tgr tgt tgu tna tnb tnd tng tnn tnr tnt tra trb trd trg trn trr trt tru tta ttb ttd ttg ttn ttr ttt ttu tua tub tud tug tun tur tut tuu ua- uaa uab uad uag uan uar uat uau uba ubb ubg ubn ubr ubt ubu uda udb udd udg udn udr udt udu uga ugb ugg ugn ugr ugt ugu un- una unb und ung unn unr unt unu ur- ura urb urd urg urn urr urt uru uta utb utd utn utr utt utu uua uug uun uur uut uuu