-er a-a a-b a-c aaa aab aac aae aah aak aar ab- aba abb abc abe abh abk abr ac- aca acb acc ace ach ack acr aea aeb aec aee aeh aek aer aha ahb ahc ahe ahh ahk ahr aka akb akc ake akh akk akr ar- ara arb arc are arh ark arr baa bab bac bae bah bak bar bba bbb bbc bbe bbh bbk bbr bca bcb bcc bce bch bck bcr be- bea beb bec bee beh bek ber bha bhb bhc bhe bhh bhk bhr bka bkb bkc bke bkk bkr bra brb bre brh brk brr c-- caa cab cac cae cah cak car cba cbb cbc cbe cbh cbk cbr cca ccb ccc cce cch cck ccr ce- cea ceb cec cee ceh cek cer ch- cha chb chc che chh chk chr cka ckb ckc ckh cra crb crc cre crh crk crr eaa eab eac eae eah eak ear eba ebb ebc ebe ebh ebk ebr ec- eca ecb ecc ece ech eck ecr eea eeb eec eee eek eer eha ehb ehc ehe ehh ehr eka ekb ekc eke ekh ekr era erb erc ere erh erk err haa hab hac hae hah hak har hba hbb hbc hbe hbh hbk hbr hca hcb hcc hce hch hck hcr he- hea heb hec hee heh hek her hha hhb hhc hhe hhh hhk hhr hka hkb hkh hkk hkr hr- hra hrb hrc hre hrh hrk hrr ka- kaa kab kac kae kah kak kar kba kbb kbc kbe kbh kbk kbr kca kcb kcc kce kch kck kcr ke- kea keb kec kee keh kek ker kha khe khh khk khr kkb kkc kke kkh kkk kkr kra krc krk krr ra- raa rab rac rae rah rak rar rba rbb rbc rbe rbh rbk rbr rca rcb rcc rce rch rcr re- rea reb rec ree reh rek rer rh- rha rhb rhc rhe rhh rhr rkb rkc rke rkk rra rrb rrc 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 aaha aahk aaka aake aara aarc aare abaa abab abac abae abak abar abb- abba abbb abbe abbr abca abcb abcc abch abcr abec abee aber abha abhr abra abrc acaa acab acac acae acar acba acca accc acce acch ace- acea acec aceh acek acer acha ache achh achr acke acr- acra acrc acre acrr aeac aecb aeer aeka aer- aera aerc ahab ahac ahah ahar ahha ahra ahrc ahre ahrr akaa akae akah akar akca akee aker akha akka akr- akra akre arab arac arae arah arak arar arba arbe arbh arc- arca arce arch area arec aree areh arek arh- arka arke arkh arr- arra arrc arre arrh arrk arrr baaa baah baak baar baba babb babe babr bac- baca bacc bace bach back baek baer baha bahr bak- baka bake bakh bakr bar- bara barb barc bare barh bark barr bbbb bbch bbeb bbrc bcaa bcar bcbc bcca bccc bcec bcer bche bcra beah beak bear beba bebb bebe beca bech beck beeb beek beer behr beka beke bera berc bere berk berr bhar bhca bhcc bher bhra brab brac brae brah brak brca brcb brce brea breb brec bree brek brer brka brkb brrr caaa caab caac caah caba cabe cac- caca cacc cace cach cack cacr caec caer caha cahe caka cake cara carb carc care cark carr cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbha cbka cbkr cbre cbrh ccaa ccab ccac ccar ccba ccbc ccca cccb cccc ccee ccha cche cchr ccra ccrc ccre ceac cear ceba cec- ceca cece ceeb ceec ceke cer- cera cerc cere chaa chab chac chae chah chak char chca chce chch chea cheb chec chee cheh chek cher chha chka chkb chra chrb chrc chrr ckac ckbc ckbe ckch ckck cker ckrc crab crac crar crbc crca crcc crce crcr cre- crea creb crec cree creh crkc eaba eabh eaca eacc each eaec 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 eeka eeke eera eerc ehaa ehcc ehea eheh eher ehre eka- ekab ekch ekeb ekek eker ekka erba erbb erbe erca ercc erce erch ereb erec erer erhc erke erra errc erre haab haak haar haba habe hace hack haec haha haka hake hakk hara harc hare harh hark harr hbar hcbc hcca hccb hccc hcch heah hear hebb hebe hebr heca hech heck heeb heek heer hehe heka heke hera herb herc here herk herr hhaa hhhh hkcc hrac hree hrrc kaaa kaab kaak kaar kaba kabb kabc kabe kabr kacb kacc kace kach kaeh kaer kaha kahc kahe kahr kaka kakc kake kakh kakk kara karb kare kark karr kbaa kbab kbac kbae kbak kbar kbba kbbb kbbc kbbe kbbk kbbr kbca kbcb kbce kbch kbck kbcr kbeb kbec kbee kbeh kbek kber kbhb kbhc kbhe kbhh kbhr kbkb kbkk kbkr kbra kbrb kbrc kbre kbrh kbrk kcaa kcab kcac kcah kcar kcba kcbc kcbk kcbr kcca kccb kccc kcck kccr kcea kceb kcec kcee kcha kche kchh kchk kchr kckc kckk kckr kcrc kcrh kcrr kea- keak kear keba kebb kebc kebe kebr keca kech keck kecr keeh keek keer kehk kehr keka kekb kekc keke ker- kera kerb kerc kere kerk kerr khab khac khak khar khbc khbr khca khcb khcc khch khck kheb khec kher khhk khka khke khkk khkr khra khrk khrr kkaa kkac kkar kkba kkbb kkbe kkbr kkcb kkch kkck kkcr kkea kkha kkhb kkhh kkhk kkhr kkkk kkrb kkrc kkre kkrh kkrk kkrr krab krac krae krah krak krar krba krbb krbe krbk krbr krca krcb krcc krce krch krea kreb krec kree kreh krek krhc krka krkc krke krkh krkk krkr krrb krrc krre krrk krrr raab raak raba