-th a-a a-b a-c a-t aaa aab aac aah aan aar aat aau ab- aba abb abc abh abn abr abt abu ac- aca acb acc ach acn acr act acu aha ahb ahc ahh ahn ahr aht ahu an- ana anb anc anh ann anr ant anu ar- ara arb arc arh arn arr art aru at- ata atb atc ath atn atr att atu au- aua aub auc auh aun aur aut b-u baa bab bac bah ban bar bat bau bba bbb bbc bbh bbn bbr bbt bbu bca bcb bcc bch bcn bcr bct bcu bha bhb bhc bhh bhr bht bhu bna bnb bnc bnn bnr bnt bnu bra brb brh brn brr brt bru bta btb btc bth btn btr btt btu bua bub buc buh bun bur but buu c-- caa cab cac cah can car cat cau cba cbb cbc cbh cbn cbr cbt cbu cca ccb ccc cch ccn ccr cct ccu ch- cha chb chc chh chn chr cht chu cn- cna cnb cnc cnh cnn cnr cnt cnu cra crb crc crh crn crr crt cru cta ctb ctc cth ctn ctr ctt ctu cua cub cuc cuh cun cur cut cuu haa hab hac hah han har hat hau hba hbb hbc hbh hbn hbr hbt hbu hca hcb hcc hch hcn hcr hct hha hhb hhc hhh hhn hhr hht hhu hna hnb hnc hnh hnn hnt hnu hr- hra hrb hrc hrh hrn hrr hrt hru hta htb htc hth htn htr htt hua hub huc huh hun hur hut huu naa nab nac nah nan nar nat nau nba nbb nbc nbn nbr nbt nbu nca ncb ncc nch ncn ncr nct ncu nha nhb nhc nhh nhn nhr nht nhu nna nnb nnc nnh nnn nnt nnu nra nrb nrc nrn nrr nrt nru nta ntb ntc nth ntn ntr ntt ntu nua nub nuc nuh nun nur nut nuu ra- raa rab rac rah ran rar rat rau rba rbb rbc rbh rbn rbr rbt rbu rca rcb rcc rch rcn rcr rct rcu rh- rha rhb rhc rhh rhn rhr rht rhu rna rnb rnc rnh rnn rnr rnt rnu rra rrb rrc rrh rrn rrr rrt rru rta rtb rtc rtn rtr rtt rtu rua rub ruc ruh run rur rut ruu taa tab tac tah tan tar tat tau tba tbb tbc tbh tbn tbr tbt tbu tca tcb tcc tch tcn tcr tct tcu th- tha thb thc thh thn thr tht thu tna tnb tnc tnh tnn tnr tnt tra trb trc trh trn trr trt tru tta ttb ttc tth ttn ttr ttt ttu tua tub tuc tuh tun tur tut tuu ua- uaa uab uac uah uan uar uat uau uba ubb ubc ubh ubn ubr ubt ubu uca ucb ucc uch ucn ucr uct ucu uha uhb uhc uhh uhr uht uhu un- una unb unc unh unn unr unt unu ur- ura urb urc urn urr urt uru uta utb utc uth utn utr utt utu uua uuc uun uur uut uuu