-er -th a-a a-b a-c a-t aaa aab aac aae aah aar aat aau ab- aba abb abc abe abh abr abt abu ac- aca acb acc ace ach acr act acu aea aeb aec aee aeh aer aet aeu aha ahb ahc ahe ahh ahr aht ahu ar- ara arb arc are arh arr art aru at- ata atb atc ate ath atr att atu au- aua aub auc aue auh aur aut b-u baa bab bac bae bah bar bat bau bba bbb bbc bbe bbh bbr bbt bbu bca bcb bcc bce bch bcr bct bcu be- bea beb bec bee beh ber bet beu bha bhb bhc bhe bhh bhr bht bhu bra brb bre brh brr brt bru bta btb btc bte bth btr btt btu bua bub buc bue buh bur but buu c-- caa cab cac cae cah car cat cau cba cbb cbc cbe cbh cbr cbt cbu cca ccb ccc cce cch ccr cct ccu ce- cea ceb cec cee ceh cer cet ceu ch- cha chb chc che chh chr cht chu cra crb crc cre crh crr crt cru cta ctb ctc cte cth ctr ctt ctu cua cub cuc cue cuh cur cut cuu eaa eab eac eae eah ear eat eau eba ebb ebc ebe ebh ebr ebt ebu ec- eca ecb ecc ece ech ecr ect ecu eea eeb eec eee eer eet eha ehb ehc ehe ehh ehr eht ehu era erb erc ere erh err ert eru eta etb etc ete eth etr ett etu eu- eua eub euc eue eur eut haa hab hac hae hah har hat hau hba hbb hbc hbe hbh hbr hbt hbu hca hcb hcc hce hch hcr hct he- hea heb hec hee heh her het heu hha hhb hhc hhe hhh hhr hht hhu hr- hra hrb hrc hre hrh hrr hrt hru hta htb htc hte hth htr htt hua hub huc hue huh hur hut huu ra- raa rab rac rae rah rar rat rau rba rbb rbc rbe rbh rbr rbt rbu rca rcb rcc rce rch rcr rct rcu re- rea reb rec ree reh rer ret reu rh- rha rhb rhc rhe rhh rhr rht rhu rra rrb rrc rrh rrr rrt rru rta rtb rtc rte rtr rtt rtu rua rub ruc rue ruh rur rut ruu taa tab tac tae tah tar tat tau tba tbb tbc tbe tbh tbr tbt tbu tca tcb tcc tce tch tcr tct tcu te- tea teb tec tee teh ter tet teu th- tha thb thc the thh thr tht thu tra trb trc tre trh trr trt tru tta ttb ttc tte tth ttr ttt ttu tua tub tuc tue tuh tur tut tuu ua- uaa uab uac uae uah uar uat uau uba ubb ubc ube ubh ubr ubt ubu uca ucb ucc uce uch ucr uct ucu uea ueb uec uee ueh uer uet uha uhb uhc uhe uhh uhr uht uhu ur- ura urb urc ure urr urt uru uta utb utc ute uth utr utt utu uua uuc uue uur uut uuu