-th a-a a-b a-t aaa aab aad aah aan aar aat ab- aba abb abd abh abn abr abt ad- ada adb add adh adn adr adt aha ahb ahd ahh ahn ahr aht an- ana anb and anh ann anr ant ar- ara arb ard arh arn arr art at- ata atb atd ath atn atr att baa bab bad bah ban bar bat bba bbb bbd bbh bbn bbr bbt bda bdb bdd bdh bdr bdt bha bhb bhd bhh bhr bht bna bnb bnd bnn bnr bnt bra brb brd brh brn brr brt bta btb btd bth btn btr btt daa dab dad dah dan dar dat dba dbb dbd dbh dbn dbr dbt dda ddb ddd ddh ddn ddr ddt dh- dha dhb dhd dhh dhr dht dna dnb dnd dnh dnn dnr dnt dra drb drd drn drr drt dta dtb dtd dth dtn dtr dtt haa hab had hah han har hat hba hbb hbd hbh hbn hbr hbt hda hdb hdd hdh hdn hdr hdt hha hhb hhd hhh hhn hhr hht hna hnb hnd hnh hnn hnt hr- hra hrb hrd hrh hrn hrr hrt hta htb htd hth htn htr htt naa nab nad nah nan nar nat nba nbb nbd nbn nbr nbt nda ndb ndd ndh ndn ndr ndt nha nhb nhd nhh nhn nhr nht nna nnb nnh nnn nnt nra nrb nrd nrn nrr nrt nta ntb ntd nth ntn ntr ntt ra- raa rab rad rah ran rar rat rba rbb rbd rbh rbn rbr rbt rda rdb rdd rdh rdn rdr rdt rh- rha rhb rhd rhh rhn rhr rht rna rnb rnd rnh rnn rnr rnt rra rrb rrd rrh rrn rrr rrt rta rtb rtd rtn rtr rtt taa tab tad tah tan tar tat tba tbb tbd tbh tbn tbr tbt tda tdb tdd tdh tdn tdr tdt th- tha thb thd thh thn thr tht tna tnb tnd tnh tnn tnr tnt tra trb trd trh trn trr trt tta ttb ttd tth ttn ttr ttt