-er -th a-a a-b a-c a-t aaa aab aac aae aah aao aar aat aau ab- aba abb abc abe abh abo abr abt abu ac- aca acb acc ace ach aco acr act acu aea aeb aec aee aeh aeo aer aet aeu aha ahb ahc ahe ahh aho ahr aht ahu aoa aob aoc aoe aoh aoo aor aot aou ar- ara arb arc are arh aro arr art aru at- ata atb atc ate ath ato atr att atu au- aua aub auc aue auh auo aur aut b-u baa bab bac bae bah bao bar bat bau bba bbb bbc bbe bbh bbo bbr bbt bbu bca bcb bcc bce bch bco bcr bct bcu be- bea beb bec bee beh beo ber bet beu bha bhb bhc bhe bhh bho bhr bht bhu boa bob boc boe boh boo bor bot bou bra brb bre brh bro brr brt bru bta btb btc bte bth bto btr btt btu bua bub buc bue buh buo bur but buu c-- caa cab cac cae cah cao car cat cau cba cbb cbc cbe cbh cbo cbr cbt cbu cca ccb ccc cce cch cco ccr cct ccu ce- cea ceb cec cee ceh ceo cer cet ceu ch- cha chb chc che chh cho chr cht chu co- coa cob coc coe coh coo cor cot cou cra crb crc cre crh cro crr crt cru cta ctb ctc cte cth cto ctr ctt ctu cua cub cuc cue cuh cuo cur cut cuu eaa eab eac eae eah eao ear eat eau eba ebb ebc ebe ebh ebo ebr ebt ebu ec- eca ecb ecc ece ech eco ecr ect ecu eea eeb eec eee eeo eer eet eha ehb ehc ehe ehh eho ehr eht ehu eo- eoa eob eoc eoe eoh eoo eor eot eou era erb erc ere erh ero err ert eru eta etb etc ete eth eto etr ett etu eu- eua eub euc eue eur eut haa hab hac hae hah hao har hat hau hba hbb hbc hbe hbh hbo hbr hbt hbu hca hcb hcc hce hch hco hcr hct he- hea heb hec hee heh heo her het heu hha hhb hhc hhe hhh hho hhr hht hhu hoa hob hoc hoe hoh hoo hor hot hou hr- hra hrb hrc hre hrh hro hrr hrt hru hta htb htc hte hth hto htr htt hua hub huc hue huh huo hur hut huu oaa oab oac oae oah oao oar oat oau ob- oba obb obc obe obh obo obr obt obu oc- oca ocb occ och oco ocr oct ocu oea oeb oec oee oeh oeo oer oet oha ohc ohe ohh oho ohr oht ohu oo- ooa oob ooc ooh ooo oor oot or- ora orb orc ore orh oro orr ort oru ot- ota otb otc ote oth oto otr ott otu ou- oua ouc oue ouh ouo our out ra- raa rab rac rae rah rao rar rat rau rba rbb rbc rbe rbh rbo rbr rbt rbu rca rcb rcc rce rch rco rcr rct rcu re- rea reb rec ree reh reo rer ret reu rh- rha rhb rhc rhe rhh rho rhr rht rhu roa rob roc roe roh roo ror rot rou rra rrb rrc rrh rrr rrt rru rta rtb rtc rte rto rtr rtt rtu rua rub ruc rue ruh ruo rur rut ruu taa tab tac tae tah tao tar tat tau tba tbb tbc tbe tbh tbo tbr tbt tbu tca tcb tcc tce tch tco tcr tct tcu te- tea teb tec tee teh teo ter tet teu th- tha thb thc the thh tho thr tht thu to- toa tob toc toe toh too tor tot tou tra trb trc tre trh tro trr trt tru tta ttb ttc tte tth tto ttr ttt ttu tua tub tuc tue tuh tuo tur tut tuu ua- uaa uab uac uae uah uao uar uat uau uba ubb ubc ube ubh ubo ubr ubt ubu uca ucb ucc uce uch uco ucr uct ucu uea ueb uec uee ueh uer uet uha uhb uhc uhe uhh uho uhr uht uhu uoa uob uoc uoe uoo uor uot ur- ura urb urc ure uro urr urt uru uta utb utc ute uth uto utr utt utu uua uuc uue uur uut uuu