-th a-a a-b a-c a-t aaa aab aac aaf aah aan aar aat aau ab- aba abb abc abf abh abn abr abt abu ac- aca acb acc acf ach acn acr act acu af- afa afb afc aff afh afn afr aft afu aha ahb ahc ahf ahh ahn ahr aht ahu an- ana anb anc anf anh ann anr ant anu ar- ara arb arc arf arh arn arr art aru at- ata atb atc atf ath atn atr att atu au- aua aub auc auf auh aun aur aut b-u baa bab bac baf bah ban bar bat bau bba bbb bbc bbf bbh bbn bbr bbt bbu bca bcb bcc bcf bch bcn bcr bct bcu bfa bfb bfc bff bfh bfn bfr bft bfu bha bhb bhc bhf bhh bhr bht bhu bna bnb bnc bnf bnn bnr bnt bnu bra brb brf brh brn brr brt bru bta btb btc btf bth btn btr btt btu bua bub buc buf buh bun bur but buu c-- caa cab cac caf cah can car cat cau cba cbb cbc cbf cbh cbn cbr cbt cbu cca ccb ccc ccf cch ccn ccr cct ccu cfa cfb cfc cff cfh cfn cfr cft cfu ch- cha chb chc chf chh chn chr cht chu cn- cna cnb cnc cnf cnh cnn cnr cnt cnu cra crb crc crf crh crn crr crt cru cta ctb ctc ctf cth ctn ctr ctt ctu cua cub cuc cuf cuh cun cur cut cuu faa fab fac faf fah fan far fat fau fba fbb fbc fbf fbh fbn fbr fbt fbu fca fcb fcc fcf fcn fcr fct fcu ffa ffc fff ffh ffn ffr fft ffu fha fhb fhc fhf fhh fhn fhr fna fnb fnc fnf fnh fnn fnr fnt fnu fra frb frc frf frh frn frr frt fru fta ftb ftc ftf fth ftn ftr ftt ftu fua fub fuf fun fur fut fuu haa hab hac haf hah han har hat hau hba hbb hbc hbf hbh hbn hbr hbt hbu hca hcb hcc hcf hch hcn hcr hct hfa hfb hfc hff hfh hfn hfr hft hfu hha hhb hhc hhf hhh hhn hhr hht hhu hna hnb hnc hnf hnh hnn hnt hnu hr- hra hrb hrc hrf hrh hrn hrr hrt hru hta htb htc htf hth htn htr htt hua hub huc huf huh hun hur hut huu naa nab nac naf nah nan nar nat nau nba nbb nbc nbf nbn nbr nbt nbu nca ncb ncc ncf nch ncn ncr nct ncu nfa nfb nfc nff nfn nfr nft nfu nha nhb nhc nhf nhh nhn nhr nht nhu nna nnb nnc nnf nnh nnn nnt nnu nra nrb nrc nrf nrn nrr nrt nru nta ntb ntc ntf nth ntn ntr ntt ntu nua nub nuc nuh nun nur nut nuu ra- raa rab rac raf rah ran rar rat rau rba rbb rbc rbf rbh rbn rbr rbt rbu rca rcb rcc rcf rch rcn rcr rct rcu rfa rfb rfc rff rfh rfn rfr rft rfu rh- rha rhb rhc rhf rhh rhn rhr rht rhu rna rnb rnc rnh rnn rnr rnt rnu rra rrb rrc rrf rrh rrn rrr rrt rru rta rtb rtc rtf rtn rtr rtt rtu rua rub ruc ruf ruh run rur rut ruu taa tab tac taf tah tan tar tat tau tba tbb tbc tbf tbh tbn tbr tbt tbu tca tcb tcc tcf tch tcn tcr tct tcu tfa tfb tfc tff tfh tfn tfr tft tfu th- tha thb thc thf thh thn thr tht thu tna tnb tnc tnf tnh tnn tnr tnt tra trb trc trf trh trn trr trt tru tta ttb ttc ttf tth ttn ttr ttt ttu tua tub tuc tuf tuh tun tur tut tuu ua- uaa uab uac uaf uah uan uar uat uau uba ubb ubc ubf ubh ubn ubr ubt ubu uca ucb ucc ucf uch ucn ucr uct ucu ufa ufc uff ufh ufn ufr uft ufu uha uhb uhc uhf uhh uhr uht uhu un- una unb unc unf unh unn unr unt unu ur- ura urb urc urf urn urr urt uru uta utb utc utf uth utn utr utt utu uua uuc uun uur uut uuu