-er a-a a-b a-c aaa aab aac aae aag aar aau ab- aba abb abc abe abg abr abu ac- aca acb acc ace acg acr acu aea aeb aec aee aeg aer aeu ag- aga agb agc age agg agr agu ar- ara arb arc are arg arr aru au- aua aub auc aue aug aur b-u baa bab bac bae bag bar bau bba bbb bbc bbe bbg bbr bbu bca bcb bcc bce bcg bcr bcu be- bea beb bec bee beg ber beu bga bgb bgc bge bgg bgr bgu bra brb bre brg brr bru bua bub buc bue bug bur buu c-- caa cab cac cae cag car cau cba cbb cbc cbe cbg cbr cbu cca ccb ccc cce ccg ccr ccu ce- cea ceb cec cee ceg cer ceu cga cgb cgc cge cgg cgr cgu cra crb crc cre crg crr cru cua cub cuc cue cug cur cuu eaa eab eac eae eag ear eau eba ebb ebc ebe ebg ebr ebu ec- eca ecb ecc ece ecg ecr ecu eea eeb eec eee eeg eer ega egb egc ege egg egr egu era erb erc ere erg err eru eu- eua eub euc eue eug eur gaa gab gac gae gag gar gau gba gbc gbe gbg gbr gbu gca gcb gcc gce gcg gcr gcu ge- gea geb gec gee geg ger geu gga ggb ggc ggg ggr ggu gra grb grc gre grg grr gru gu- gua gub guc gue gug gur guu ra- raa rab rac rae rag rar rau rba rbb rbc rbe rbg rbr rbu rca rcb rcc rce rcg rcr rcu re- rea reb rec ree reg rer reu rga rgb rgc rge rgg rgr rra rrb rrc rrg rrr rru rua rub ruc rue rug rur ruu ua- uaa uab uac uae uag uar uau uba ubb ubc ube ubg ubr ubu uca ucb ucc uce ucg ucr ucu uea ueb uec uee ueg uer uga ugb ugc uge ugg ugr ugu ur- ura urb urc ure urg urr uru uua uuc uue uug uur uuu

a-be aaaa aaab aaac aaae aaar aaba aabb aabc aaca aacb aacc aace aacr aacu aaea aaec aage aara aarc aare aaru abaa abab abac abae abag abar abau abb- abba abbb abbe abbr abca abcb abcc abcr abec abee aber abra abrc abua abue abug acaa acab acac acae acag acar acba acca accc acce accu ace- acea acec acer acga acgr acr- acra acrc acre acrr acu- acue acur aeac aecb aeer aega aer- aera aerc agac agag agar agau agba agca agcc agce agea agee ager agga agge aggu agra agre agua ague agur arab arac arae arag arar arau arba arbe arc- arca arce area arec aree areg areu arga argb arge arr- arra arrc arre arrg arrr arru arua arub arue arug auaa aube auca auce auer auga auge aur- aura aure auug baaa baar baba babb babe babr babu bac- baca bacc bace baer baga bage bagg bar- bara barb barc bare barg barr baru bau- baug baur bbau bbbb bbeb bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcec bcer bcra bcru bcuc beag bear beau beba bebb bebe beca becu beeb beeg beer bega begg begu bera berc bere berg berr beru beur bgca brab brac brae brag brau brca brcb brce brea breb brec bree breg brer brrr bruc brue brug buar buba bubb bube bubu buca bucc buce bucu buea buer bueu buga buge bugg bur- bura burb bure burg burr buru caaa caab caac caba cabe cabg cabu cac- caca cacc cace cacr caec caer caeu caga cage cagg cagr cara carb carc care carr cauc cbac cbar cbbc cbca cbcc cbce cbcr cbcu cbea cbec cbee cber cbga cbgb cbre ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc cccu ccee ccga ccgc ccra ccrc ccre ccrg ccuc ceac cear ceba cebu cec- ceca cece ceeb ceec cege cer- cera cerc cere cgac cgcc cgcg cger crab crac crag crar crau crbc crbu crca crcc crce crcr cre- crea creb crec cree creg creu crub crue crug cuau cub- cuba cubb cube cuca cucc cuce cuer cuga cura curb cure curr eaba eaca eacc eaec eaga eage eara earb eare ebac ebba ebbc ebbr ebcc eber ebru ebur ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce ecra ecrc ecrr ecru ecua eeca eeea eeee eega eera eerc eerg egaa egae egar egba egbe egbu egcc egcg egcr egea egec egee eger eggb egge egra egre erau erba erbb erbe erca ercc erce ereb erec erer erg- erga ergg erra errc erre erua erub eruc erur euba eubc euer euge eur- eura eurc eure gaar gaba gabb gabe gabr gabu gace gaea gaec gaer gaga gage gagg gagu gara garb gare garg garr gaua gaub gaue gaur gbag gc-c gcaa gcbc gccc gcrg geab gear geba gebe geca gece geer gege gegg gera gerb gere geru geue gggg grab grac grae grau grbr grcc grce grea greb grec gree greg greu grrr grua grub grue grug grur guaa guac guag guar guba gubb gubu guca guer guga gugb guge gugg gugu gura gurb gure gurg gurr guru raab raag raba rabb rabe rabu rac- raca racc race racu raec raeg raer raga rage ragg ragu rara rarb rare raua raub rauc raue rbbb rbbr rcac rcbc rccb rccc rcga rcgc rcrg rea- reac reae rear reau reba rebb rebe rebu reca recc rece recr recu reeb rega rege regr regu rera rere rerg reru reue reuu rgba rgbe rrrr ruag ruba rubb rube rubu ruca ruce ruer ruga ruge rugg rura rurc rure ruru uabc uaca uarc uaru uaua ubac ubar ubba ubbe uber ubra ucar ucbc ucca ucea ucrc ucua ueba ugab ugar ugcc ugcg ugra ugur uguu urac urau urba urbe urca ure- urea urga urge urgu urra urre urur uuuu

-aaa- aaace aaaee aaarc aaarg aabaa aabba aabga aabra