-th a-a a-b a-c a-t aaa aab aac aah aan aao aar aat aau ab- aba abb abc abh abn abo abr abt abu ac- aca acb acc ach acn aco acr act acu aha ahb ahc ahh ahn aho ahr aht ahu an- ana anb anc anh ann ano anr ant anu aoa aob aoc aoh aon aoo aor aot aou ar- ara arb arc arh arn aro arr art aru at- ata atb atc ath atn ato atr att atu au- aua aub auc auh aun auo aur aut b-u baa bab bac bah ban bao bar bat bau bba bbb bbc bbh bbn bbo bbr bbt bbu bca bcb bcc bch bcn bco bcr bct bcu bha bhb bhc bhh bho bhr bht bhu bna bnb bnc bnn bno bnr bnt bnu boa bob boc boh bon boo bor bot bou bra brb brh brn bro brr brt bru bta btb btc bth btn bto btr btt btu bua bub buc buh bun buo bur but buu c-- caa cab cac cah can cao car cat cau cba cbb cbc cbh cbn cbo cbr cbt cbu cca ccb ccc cch ccn cco ccr cct ccu ch- cha chb chc chh chn cho chr cht chu cn- cna cnb cnc cnh cnn cno cnr cnt cnu co- coa cob coc coh con coo cor cot cou cra crb crc crh crn cro crr crt cru cta ctb ctc cth ctn cto ctr ctt ctu cua cub cuc cuh cun cuo cur cut cuu haa hab hac hah han hao har hat hau hba hbb hbc hbh hbn hbo hbr hbt hbu hca hcb hcc hch hcn hco hcr hct hha hhb hhc hhh hhn hho hhr hht hhu hna hnb hnc hnh hnn hno hnt hnu hoa hob hoc hoh hon hoo hor hot hou hr- hra hrb hrc hrh hrn hro hrr hrt hru hta htb htc hth htn hto htr htt hua hub huc huh hun huo hur hut huu naa nab nac nah nan nao nar nat nau nba nbb nbc nbn nbo nbr nbt nbu nca ncb ncc nch ncn nco ncr nct ncu nha nhb nhc nhh nhn nhr nht nhu nna nnb nnc nnh nnn nno nnt nnu no- noa nob noc noh non noo nor not nou nra nrb nrc nrn nro nrr nrt nru nta ntb ntc nth ntn nto ntr ntt ntu nua nub nuc nuh nun nuo nur nut nuu oaa oab oac oah oan oao oar oat oau ob- oba obb obc obh obn obo obr obt obu oc- oca ocb occ och ocn oco ocr oct ocu oha ohc ohh ohn oho ohr oht ohu on- ona onb onc onh onn ono onr ont onu oo- ooa oob ooc ooh oon ooo oor oot or- ora orb orc orh orn oro orr ort oru ot- ota otb otc oth otn oto otr ott otu ou- oua ouc ouh oun ouo our out ra- raa rab rac rah ran rao rar rat rau rba rbb rbc rbh rbn rbo rbr rbt rbu rca rcb rcc rch rcn rco rcr rct rcu rh- rha rhb rhc rhh rhn rho rhr rht rhu rna rnb rnc rnh rnn rno rnr rnt rnu roa rob roc roh ron roo ror rot rou rra rrb rrc rrh rrn rrr rrt rru rta rtb rtc rtn rto rtr rtt rtu rua rub ruc ruh run ruo rur rut ruu taa tab tac tah tan tao tar tat tau tba tbb tbc tbh tbn tbo tbr tbt tbu tca tcb tcc tch tcn tco tcr tct tcu th- tha thb thc thh thn tho thr tht thu tna tnb tnc tnh tnn tno tnr tnt to- toa tob toc toh ton too tor tot tou tra trb trc trh trn tro trr trt tru tta ttb ttc tth ttn tto ttr ttt ttu tua tub tuc tuh tun tuo tur tut tuu ua- uaa uab uac uah uan uao uar uat uau uba ubb ubc ubh ubn ubo ubr ubt ubu uca ucb ucc uch ucn uco ucr uct ucu uha uhb uhc uhh uho uhr uht uhu un- una unb unc unh unn uno unr unt unu uoa uob uoc uon uoo uor uot ur- ura urb urc urn uro urr urt uru uta utb utc uth utn uto utr utt utu uua uuc uun uur uut uuu