-er a-a a-b a-c aaa aab aac aad aae aak aar aas ab- aba abb abc abd abe abk abr abs ac- aca acb acc acd ace ack acr acs ad- ada adb adc add ade adk adr ads aea aeb aec aed aee aek aer aes aka akb akc akd ake akk akr aks ar- ara arb arc ard are ark arr ars as- asa asb asc asd ase ask asr ass baa bab bac bad bae bak bar bas bba bbb bbc bbd bbe bbk bbr bbs bca bcb bcc bcd bce bck bcr bcs bda bdb bdc bdd bde bdk bdr bds be- bea beb bec bed bee bek ber bes bka bkb bkc bke bkk bkr bks bra brb brd bre brk brr brs bsa bsb bsc bsd bse bsk bsr bss c-- caa cab cac cad cae cak car cas cba cbb cbc cbd cbe cbk cbr cbs cca ccb ccc ccd cce cck ccr ccs cda cdb cdc cdd cde cdk cdr cds ce- cea ceb cec ced cee cek cer ces cka ckb ckc ckd cks cra crb crc crd cre crk crr crs csa csb csc csd cse csk csr css daa dab dac dad dae dak dar das dba dbb dbc dbd dbe dbk dbr dbs dca dcb dcc dcd dce dck dcr dcs dda ddb ddc ddd dde ddk ddr dds de- dea deb dec ded dee dek der des dka dkb dkc dke dkk dkr dks dra drb drc drd dre drk drr drs dsa dsb dsc dsd dse dsk dsr dss eaa eab eac ead eae eak ear eas eba ebb ebc ebd ebe ebk ebr ebs ec- eca ecb ecc ecd ece eck ecr ecs ed- eda edb edc edd ede edk edr eds eea eeb eec eed eee eek eer ees eka ekb ekc ekd eke ekr eks era erb erc erd ere erk err ers es- esa esb esc esd ese esk esr ess ka- kaa kab kac kad kae kak kar kas kba kbb kbc kbd kbe kbk kbr kbs kca kcb kcc kcd kce kck kcr kcs kda kdb kdc kde kdk kdr kds ke- kea keb kec ked kee kek ker kes kkb kkc kke kkk kkr kks kra krc krd krk krr krs ksa ksb ksc ksd kse ksk ksr kss ra- raa rab rac rad rae rak rar ras rba rbb rbc rbd rbe rbk rbr rbs rca rcb rcc rcd rce rcr rcs rda rdb rdc rdd rde rdr rds re- rea reb rec red ree rek rer res rkb rkc rke rkk rks rra rrb rrc rrd rrk rrr rrs rsa rsb rsc rsd rse rsk rsr rss saa sab sac sad sae sak sar sas sba sbb sbc sbd sbe sbk sbr sbs sca scb scc scd sce sck scr scs sda sdb sdc sdd sde sdk sdr sds se- sea seb sec sed see sek ser ses sk- ska skb skc skd ske skk skr sks sr- sra srb src srd sre srk srr srs ss- ssa ssb ssc ssd sse ssk ssr sss

-ase a-ak a-be aaaa aaab aaac aaad aaae aaar aaas aaba aabb aabc aabd aaca aacb aacc aacd aace aack aacr aacs aada aadc aade aads aaea aaec aaes aaka aake aara aarc aard aare aars aasa aasc aasd aase aass abaa abab abac abad abae abak abar abas abb- abba abbb abbe abbr abbs abca abcb abcc abcd abcr abcs abda abec abed abee aber abes abra abrc abrs abs- absa absd abse abss acaa acab acac acad acae acar acas acba acca accc accd acce accs acda acdb acdc acde acds ace- acea acec aced acek acer aces ackd acke acks acr- acra acrc acre acrr acrs acsa acsc acsd acse acss adaa adab adac adad adae adak adar adas adba adbc adcc adcs adda addc addd adde addr adds adea adeb adee ader ades adra adre adrs adsa adsr adss aeac aeas aebs aecb aede aeer aeka aer- aera aerc aerd aers aesc aesd aess akaa akae akar akas akca aked akee aker akes akka akr- akra akre aksa arab arac arad arae arak arar aras arba arbe arbs arc- arca arce arcs arda ardc arde ards area arec ared aree arek ares arka arke arks arr- arra arrc arre arrk arrr arrs ars- arsa arsc arsd arse arsk asaa asab asac asad asae asak asar asas asba asc- asca ascb ascc asce ascr asda asde asds asea asec asee asek aser ases aska aske askr asks asra asrc asrs assa assc assd asse assk assr asss baaa baad baak baar baas baba babb babe babr babs bac- baca bacc bace back bacs bada badb badd bade badr bads baed baek baer baes bak- baka bake bakr baks bar- bara barb barc bard bare bark barr bars basa basc base bask bass bbad bbas bbbb bbbs bbdd bbeb bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcda bcde bcds bcec bcer bces bcra bcrs bcsa bcsc bcss bd-r bdbc bddc bdes bdsd bead beak bear beas beba bebb bebe beca beck becs beda bede beds beeb beed beek beer bees beka beke beks bera berc berd bere berk berr bers bes- besa bese besk bess brab brac brad brae brak bras brca brcb brce brda brds brea breb brec bred bree brek brer bres brka brkb brrr brrs brsb brsr bsaa bsac bsas bsbd bscs bsea bseb bsec bsed bsee bser bses bsra bsrd bssc bssd bsse c-cd caaa caab caac caas caba cabe cabs cac- caca cacc cace cack cacr cada cadc cadd cade cadr cads caec caer caes caka cake cara carb carc card care cark carr cars casa casb casc casd case cask casr cass cbac cbar cbbc cbbs cbca cbcc cbce cbcr cbcs cbdb cbdc cbds cbea cbec cbee cber cbka cbkr cbrd cbre cbsa cbsc cbse ccaa ccab ccac ccad ccar ccas ccba ccbc ccca cccb cccc cccs ccdc ccdr ccds cced ccee