-er a-a a-b a-c aaa aab aac aad aae aah aak aar ab- aba abb abc abd abe abh abk abr ac- aca acb acc acd ace ach ack acr ad- ada adb adc add ade adh adk adr aea aeb aec aed aee aeh aek aer aha ahb ahc ahd ahe ahh ahk ahr aka akb akc akd ake akh akk akr ar- ara arb arc ard are arh ark arr baa bab bac bad bae bah bak bar bba bbb bbc bbd bbe bbh bbk bbr bca bcb bcc bcd bce bch bck bcr bda bdb bdc bdd bde bdh bdk bdr be- bea beb bec bed bee beh bek ber bha bhb bhc bhd bhe bhh bhk bhr bka bkb bkc bke bkk bkr bra brb brd bre brh brk brr c-- caa cab cac cad cae cah cak car cba cbb cbc cbd cbe cbh cbk cbr cca ccb ccc ccd cce cch cck ccr cda cdb cdc cdd cde cdh cdk cdr ce- cea ceb cec ced cee ceh cek cer ch- cha chb chc chd che chh chk chr cka ckb ckc ckd ckh cra crb crc crd cre crh crk crr daa dab dac dad dae dah dak dar dba dbb dbc dbd dbe dbh dbk dbr dca dcb dcc dcd dce dck dcr dda ddb ddc ddd dde ddh ddk ddr de- dea deb dec ded dee deh dek der dh- dha dhb dhc dhd dhe dhh dhk dhr dka dkb dkc dke dkk dkr dra drb drc drd dre drk drr eaa eab eac ead eae eah eak ear eba ebb ebc ebd ebe ebh ebk ebr ec- eca ecb ecc ecd ece ech eck ecr ed- eda edb edc edd ede edh edk edr eea eeb eec eed eee eek eer eha ehb ehc ehd ehe ehh ehr eka ekb ekc ekd eke ekh ekr era erb erc erd ere erh erk err haa hab hac had hae hah hak har hba hbb hbc hbd hbe hbh hbk hbr hca hcb hcc hcd hce hch hck hcr hda hdb hdc hdd hde hdh hdk hdr he- hea heb hec hed hee heh hek her hha hhb hhc hhd hhe hhh hhk hhr hka hkb hkd hkh hkk hkr hr- hra hrb hrc hrd hre hrh hrk hrr ka- kaa kab kac kad kae kah kak kar kba kbb kbc kbd kbe kbh kbk kbr kca kcb kcc kcd kce kch kck kcr kda kdb kdc kde kdh kdk kdr ke- kea keb kec ked kee keh kek ker kha khe khh khk khr kkb kkc kke kkh kkk kkr kra krc krd krk krr ra- raa rab rac rad rae rah rak rar rba rbb rbc rbd rbe rbh rbk rbr rca rcb rcc rcd rce rch rcr rda rdb rdc rdd rde rdh rdr re- rea reb rec red ree reh rek rer rh- rha rhb rhc rhd rhe rhh rhr rkb rkc rke rkk rra rrb rrc rrd rrh rrk rrr

a-ak a-be a-ha aaaa aaab aaac aaad aaae aaah aaar aaba aabb aabc aabd aabh aaca aacb aacc aacd aace aach aack aacr aada aadc aade aaea aaec aaha aahk aaka aake aara aarc aard aare abaa abab abac abad abae abak abar abb- abba abbb abbe abbr abca abcb abcc abcd abch abcr abda abec abed abee aber abha abhr abra abrc acaa acab acac acad acae acar acba acca accc accd acce acch acda acdb acdc acde ace- acea acec aced aceh acek acer acha ache achh achr ackd acke acr- acra acrc acre acrr adaa adab adac adad adae adah adak adar adba adbc adcc adda addc addd adde addr adea adeb adee adeh ader adha adhd adra adre aeac aecb aede aeer aeka aer- aera aerc aerd ahab ahac ahad ahah ahar ahed ahha ahra ahrc ahre ahrr akaa akae akah akar akca aked akee aker akha akka akr- akra akre arab arac arad arae arah arak arar arba arbe arbh arc- arca arce arch arda ardc arde area arec ared aree areh arek arh- arka arke arkh arr- arra arrc arre arrh arrk arrr baaa baad baah baak baar baba babb babe babr bac- baca bacc bace bach back bada badb badd bade badh badr baed baek baer baha bahr bak- baka bake bakh bakr bar- bara barb barc bard bare barh bark barr bbad bbbb bbch bbdd bbeb bbrc bcaa bcar bcbc bcca bccc bcda bcde bcec bcer bchd bche bcra bd-r bdbc bddc bddh bead beah beak bear beba bebb bebe beca bech beck beda bede beeb beed beek beer behr beka beke bera berc berd bere berk berr bhar bhca bhcc bher bhra brab brac brad brae brah brak brca brcb brce brda brea breb brec bred bree brek brer brka brkb brrr c-cd caaa caab caac caah caba cabe cac- caca cacc cace cach cack cacr cada cadc cadd cade cadr caec caer caha cahe caka cake cara carb carc card care cark carr cbac cbar cbbc cbca cbcc cbce cbcr cbdb cbdc cbea cbec cbee cber cbha cbka cbkr cbrd cbre cbrh ccaa ccab ccac ccad ccar ccba ccbc ccca cccb cccc ccdc ccdh ccdr cced ccee ccha cche cchr ccra ccrc ccre cd-e cd-r cdaa cdac cdad cdba cdda cddb cddr cdec cder cdre ceac cead cear ceba cec- ceca cece ceda cedd cede ceeb ceec ceke cer- cera cerc cerd cere chaa chab chac chad chae chah chak char chca chce chch chea cheb chec ched chee cheh chek cher chha chka chkb chra chrb chrc chrd chrr ckac ckbc ckbe ckch ckck cker ckrc ckrd crab crac crar crbc crca crcc crce crcr crda crdc cre- crea creb crec cred cree creh crkc daab daad daae daar daba dabb daca dace dada dade daeb daer daha dahe daka dake dara darb darc dard dare dark darr dbar dbcc dcbc dcca dccb dccc dcdb dche dcra dcrk dddd ddrc ddre deac dead deae deak dear