-th a-a a-b a-c a-t aaa aab aac aad aah aan aar aat aau ab- aba abb abc abd abh abn abr abt abu ac- aca acb acc acd ach acn acr act acu ad- ada adb adc add adh adn adr adt adu aha ahb ahc ahd ahh ahn ahr aht ahu an- ana anb anc and anh ann anr ant anu ar- ara arb arc ard arh arn arr art aru at- ata atb atc atd ath atn atr att atu au- aua aub auc aud auh aun aur aut b-u baa bab bac bad bah ban bar bat bau bba bbb bbc bbd bbh bbn bbr bbt bbu bca bcb bcc bcd bch bcn bcr bct bcu bda bdb bdc bdd bdh bdr bdt bdu bha bhb bhc bhd bhh bhr bht bhu bna bnb bnc bnd bnn bnr bnt bnu bra brb brd brh brn brr brt bru bta btb btc btd bth btn btr btt btu bua bub buc bud buh bun bur but buu c-- caa cab cac cad cah can car cat cau cba cbb cbc cbd cbh cbn cbr cbt cbu cca ccb ccc ccd cch ccn ccr cct ccu cda cdb cdc cdd cdh cdn cdr cdt cdu ch- cha chb chc chd chh chn chr cht chu cn- cna cnb cnc cnd cnh cnn cnr cnt cnu cra crb crc crd crh crn crr crt cru cta ctb ctc ctd cth ctn ctr ctt ctu cua cub cuc cud cuh cun cur cut cuu daa dab dac dad dah dan dar dat dau dba dbb dbc dbd dbh dbn dbr dbt dbu dca dcb dcc dcd dcn dcr dct dcu dda ddb ddc ddd ddh ddn ddr ddt ddu dh- dha dhb dhc dhd dhh dhr dht dhu dna dnb dnc dnd dnh dnn dnr dnt dra drb drc drd drn drr drt dru dta dtb dtc dtd dth dtn dtr dtt dtu dua dub duc dud duh dun dur dut haa hab hac had hah han har hat hau hba hbb hbc hbd hbh hbn hbr hbt hbu hca hcb hcc hcd hch hcn hcr hct hda hdb hdc hdd hdh hdn hdr hdt hdu hha hhb hhc hhd hhh hhn hhr hht hhu hna hnb hnc hnd hnh hnn hnt hnu hr- hra hrb hrc hrd hrh hrn hrr hrt hru hta htb htc htd hth htn htr htt hua hub huc hud huh hun hur hut huu naa nab nac nad nah nan nar nat nau nba nbb nbc nbd nbn nbr nbt nbu nca ncb ncc ncd nch ncn ncr nct ncu nda ndb ndc ndd ndh ndn ndr ndt ndu nha nhb nhc nhd nhh nhn nhr nht nhu nna nnb nnc nnh nnn nnt nnu nra nrb nrc nrd nrn nrr nrt nru nta ntb ntc ntd nth ntn ntr ntt ntu nua nub nuc nud nuh nun nur nut nuu ra- raa rab rac rad rah ran rar rat rau rba rbb rbc rbd rbh rbn rbr rbt rbu rca rcb rcc rcd rch rcn rcr rct rcu rda rdb rdc rdd rdh rdn rdr rdt rdu rh- rha rhb rhc rhd rhh rhn rhr rht rhu rna rnb rnc rnd rnh rnn rnr rnt rnu rra rrb rrc rrd rrh rrn rrr rrt rru rta rtb rtc rtd rtn rtr rtt rtu rua rub ruc rud ruh run rur rut ruu taa tab tac tad tah tan tar tat tau tba tbb tbc tbd tbh tbn tbr tbt tbu tca tcb tcc tcd tch tcn tcr tct tcu tda tdb tdc tdd tdh tdn tdr tdt tdu th- tha thb thc thd thh thn thr tht thu tna tnb tnc tnd tnh tnn tnr tnt tra trb trc trd trh trn trr trt tru tta ttb ttc ttd tth ttn ttr ttt ttu tua tub tuc tud tuh tun tur tut tuu ua- uaa uab uac uad uah uan uar uat uau uba ubb ubc ubh ubn ubr ubt ubu uca ucb ucc ucd uch ucn ucr uct ucu uda udb udc udd udn udr udt udu uha uhb uhc uhd uhh uhr uht uhu un- una unb unc und unh unn unr unt unu ur- ura urb urc urd urn urr urt uru uta utb utc utd uth utn utr utt utu uua uuc uun uur uut uuu