-er a-a a-b a-c aaa aab aac aae aag aah aak aar ab- aba abb abc abe abg abh abk abr ac- aca acb acc ace acg ach ack acr aea aeb aec aee aeg aeh aek aer ag- aga agb agc age agg agh agk agr aha ahb ahc ahe ahg ahh ahk ahr aka akb akc ake akg akh akk akr ar- ara arb arc are arg arh ark arr baa bab bac bae bag bah bak bar bba bbb bbc bbe bbg bbh bbk bbr bca bcb bcc bce bcg bch bck bcr be- bea beb bec bee beg beh bek ber bga bgb bgc bge bgg bgh bgk bgr bha bhb bhc bhe bhg bhh bhk bhr bka bkb bkc bke bkg bkk bkr bra brb bre brg brh brk brr c-- caa cab cac cae cag cah cak car cba cbb cbc cbe cbg cbh cbk cbr cca ccb ccc cce ccg cch cck ccr ce- cea ceb cec cee ceg ceh cek cer cga cgb cgc cge cgg cgh cgr ch- cha chb chc che chg chh chk chr cka ckb ckc ckh cra crb crc cre crg crh crk crr eaa eab eac eae eag eah eak ear eba ebb ebc ebe ebg ebh ebk ebr ec- eca ecb ecc ece ecg ech eck ecr eea eeb eec eee eeg eek eer ega egb egc ege egg egh egr eha ehb ehc ehe ehg ehh ehr eka ekb ekc eke ekg ekh ekr era erb erc ere erg erh erk err gaa gab gac gae gag gah gak gar gba gbc gbe gbg gbh gbk gbr gca gcb gcc gce gcg gch gck gcr ge- gea geb gec gee geg geh gek ger gga ggb ggc ggg ggh ggr gha ghb ghc ghe ghg ghh ghr gka gkb gkh gra grb grc gre grg grh grk grr haa hab hac hae hag hah hak har hba hbb hbc hbe hbg hbh hbk hbr hca hcb hcc hce hcg hch hck hcr he- hea heb hec hee heg heh hek her hga hgb hgc hge hgg hgh hgk hgr hha hhb hhc hhe hhg hhh hhk hhr hka hkb hkg hkh hkk hkr hr- hra hrb hrc hre hrg hrh hrk hrr ka- kaa kab kac kae kag kah kak kar kba kbb kbc kbe kbh kbk kbr kca kcb kcc kce kcg kch kck kcr ke- kea keb kec kee keg keh kek ker kga kgb kgc kgh kha khe khh khk khr kkb kkc kke kkh kkk kkr kra krc krg krk krr ra- raa rab rac rae rag rah rak rar rba rbb rbc rbe rbg rbh rbk rbr rca rcb rcc rce rcg rch rcr re- rea reb rec ree reg reh rek rer rga rgb rgc rge rgg rgh rgk rgr rh- rha rhb rhc rhe rhg rhh rhr rkb rkc rke rkg rkk rra rrb rrc rrg rrh rrk rrr

a-ak a-be a-ha aaaa aaab aaac aaae aaah aaar aaba aabb aabc aabh aaca aacb aacc aace aach aack aacr aaea aaec aage aagh aaha aahk aaka aake aara aarc aare abaa abab abac abae abag abak abar abb- abba abbb abbe abbr abca abcb abcc abch abcr abec abee aber abha abhr abra abrc acaa acab acac acae acag acar acba acca accc acce acch ace- acea acec aceh acek acer acga acgr acha ache achh achr acke acr- acra acrc acre acrr aeac aecb aeer aega aeka aer- aera aerc agac agag agar agba agca agcc agce agea agee ager agga agge agha aghe agra agre ahab ahac ahah ahar ahha ahra ahrc ahre ahrr akaa akae akah akar akca akee akeg aker akha akka akr- akra akre arab arac arae arag arah arak arar arba arbe arbh arc- arca arce arch area arec aree areg areh arek arga argb arge argh arh- arka arke arkh arr- arra arrc arre arrg arrh arrk arrr baaa baah baak baar baba babb babe babr bac- baca bacc bace bach back baek baer baga bage bagg bagh baha bahr bak- baka bake bakh bakr bar- bara barb barc bare barg barh bark barr bbbb bbch bbeb bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcec bcer bche bcra beag beah beak bear beba bebb bebe beca bech beck beeb beeg beek beer bega begg behr beka beke bera berc bere berg berk berr bgca bhag bhar bhca bhcc bher bhra brab brac brae brag brah brak brca brcb brce brea breb brec bree breg brek brer brka brkb brrr caaa caab caac caah caba cabe cabg cac- caca cacc cace cach cack cacr caec caer caga cage cagg cagr caha cahe caka cake cara carb carc care cark carr cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbga cbgb cbha cbka cbkg cbkr cbre cbrh ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc ccee ccga ccgc ccha cche cchr ccra ccrc ccre ccrg ceac cear ceba cec- ceca cece ceeb ceec cege ceke cer- cera cerc cere cgac cgcc cgcg cger chaa chab chac chae chag chah chak char chca chce chch chea cheb chec chee cheh chek cher chgb chge chha chka chkb chra chrb chrc chrr ckac ckbc ckbe ckch ckck cker ckga ckrc crab crac crag crar crbc crca crcc crce crcr cre- crea creb crec cree creg creh crkc eaba eabh eaca eacc each eaec eaga eage eara earb eare earh ebac ebba ebbc ebbr ebcc eber ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce echa eche ecka ecra ecrc ecrr eeca eeea eeee eega eeka eeke eera eerc eerg egaa egae egar egba egbe egcc egcg egcr egea egec egee eger eggb egge eggh eghe eghh egra egre ehaa ehcc ehea eheh eher ehre eka- ekab ekch ekeb ekek eker ekka erba erbb erbe erca ercc erce erch ereb erec erer erg- erga ergg ergh erhc erke erra errc erre gaar gaba gabb gabe gabr gace gach