-er a-a a-b a-c a-t aaa aab aac aae aaf aao aar aat aau ab- aba abb abc abe abf abo abr abt abu ac- aca acb acc ace acf aco acr act acu aea aeb aec aee aef aeo aer aet aeu af- afa afb afc afe aff afo afr aft afu aoa aob aoc aoe aof aoo aor aot aou ar- ara arb arc are arf aro arr art aru at- ata atb atc ate atf ato atr att atu au- aua aub auc aue auf auo aur aut b-u baa bab bac bae baf bao bar bat bau bba bbb bbc bbe bbf bbo bbr bbt bbu bca bcb bcc bce bcf bco bcr bct bcu be- bea beb bec bee bef beo ber bet beu bfa bfb bfc bfe bff bfo bfr bft bfu boa bob boc boe bof boo bor bot bou bra brb bre brf bro brr brt bru bta btb btc bte btf bto btr btt btu bua bub buc bue buf buo bur but buu c-- caa cab cac cae caf cao car cat cau cba cbb cbc cbe cbf cbo cbr cbt cbu cca ccb ccc cce ccf cco ccr cct ccu ce- cea ceb cec cee cef ceo cer cet ceu cfa cfb cfc cfe cff cfo cfr cft cfu co- coa cob coc coe cof coo cor cot cou cra crb crc cre crf cro crr crt cru cta ctb ctc cte ctf cto ctr ctt ctu cua cub cuc cue cuf cuo cur cut cuu eaa eab eac eae eaf eao ear eat eau eba ebb ebc ebe ebf ebo ebr ebt ebu ec- eca ecb ecc ece ecf eco ecr ect ecu eea eeb eec eee eef eeo eer eet ef- efa efb efc efe eff efo efr eft eo- eoa eob eoc eoe eof eoo eor eot eou era erb erc ere erf ero err ert eru eta etb etc ete etf eto etr ett etu eu- eua eub euc eue euf eur eut faa fab fac fae faf fao far fat fau fba fbb fbc fbe fbf fbo fbr fbt fbu fca fcb fcc fce fcf fco fcr fct fcu fea feb fec fee fef feo fer fet feu ffa ffc ffe fff ffo ffr fft ffu foa fob foc foe fof foo for fot fou fra frb frc fre frf fro frr frt fru fta ftb ftc fte ftf fto ftr ftt ftu fua fub fue fuf fuo fur fut fuu oaa oab oac oae oaf oao oar oat oau ob- oba obb obc obe obf obo obr obt obu oc- oca ocb occ ocf oco ocr oct ocu oea oeb oec oee oef oeo oer oet of- ofa ofb ofc ofe off ofo ofr oft ofu oo- ooa oob ooc oof ooo oor oot or- ora orb orc ore orf oro orr ort oru ot- ota otb otc ote otf oto otr ott otu ou- oua ouc oue ouf ouo our out ra- raa rab rac rae raf rao rar rat rau rba rbb rbc rbe rbf rbo rbr rbt rbu rca rcb rcc rce rcf rco rcr rct rcu re- rea reb rec ree ref reo rer ret reu rfa rfb rfc rfe rff rfo rfr rft rfu roa rob roc roe rof roo ror rot rou rra rrb rrc rrf rrr rrt rru rta rtb rtc rte rtf rto rtr rtt rtu rua rub ruc rue ruf ruo rur rut ruu taa tab tac tae taf tao tar tat tau tba tbb tbc tbe tbf tbo tbr tbt tbu tca tcb tcc tce tcf tco tcr tct tcu te- tea teb tec tee tef teo ter tet teu tfa tfb tfc tfe tff tfo tfr tft tfu to- toa tob toc toe tof too tor tot tou tra trb trc tre trf tro trr trt tru tta ttb ttc tte ttf tto ttr ttt ttu tua tub tuc tue tuf tuo tur tut tuu ua- uaa uab uac uae uaf uao uar uat uau uba ubb ubc ube ubf ubo ubr ubt ubu uca ucb ucc uce ucf uco ucr uct ucu uea ueb uec uee uef uer uet ufa ufc ufe uff ufo ufr uft ufu uoa uob uoc uoe uoo uor uot ur- ura urb urc ure urf uro urr urt uru uta utb utc ute utf uto utr utt utu uua uuc uue uur uut uuu

a-be a-fu aaaa aaab aaac aaae aaaf aaar aaba aabb aabc aabt aaca aacb aacc aace aacf aaco aacr aact aacu aaea aaec aafa aafb aafc aaff aaoe aaoo aara aarc aare aaro aart aaru aata aatc aatf aatt abaa abab abac abae abaf abar abat abau abb- abba abbb abbe abbo abbr abbt abca abcb abcc abcf abcr abct abec abee aber abet abff aboa abob abof aboo abor abot abou abra abrc abro abta abtu abua abue abuf abut ac-t acaa acab acac acae acar acat acba acca accc acce accf acco acct accu ace- acea acec acer acet acfc acfe acft acoa acoe acor acot acou acr- acra acrc acre acro acrr acta actc acte actf acto actt actu acu- acue acuf acuo acur acut aeac aeaf aecb aect aeer aer- aera aerc aero aeta aetc aetf aeto aetr aett afaa afao afar afat afca afcb afcc afcu afee afer afet affa affc affo afft afoa afoe afoo afor afr- afra afrc afre afro afru afta aftc afte afua afue aoba aoca aoce aoeu aora aorb aort aotc aotf aouf aout arab arac arae araf arar arat arau arba arbe arc- arca arce arco arct area arec aree aref areo aret areu arfa arfb arfc arff arft arfu aroa arob aroe aroo aror arr- arra arrc arre arro arrr arrt arru arta artc arte arto artr arua arub arue arut at-t ataa atab atac atae atar atat atca atcc atcf atco atcr atea atec atee atef ateo ater atfb atfc atfe atob atoc atoe atof ator atot atra atrc