-er a-a a-b a-c aaa aab aac aae aaj aak aao aar ab- aba abb abc abe abj abk abo abr ac- aca acb acc ace acj ack aco acr aea aeb aec aee aej aek aeo aer aja ajb ajc aje ajj ajk ajo ajr aka akb akc ake akj akk ako akr aoa aob aoc aoe aoj aok aoo aor ar- ara arb arc are arj ark aro arr baa bab bac bae baj bak bao bar bba bbb bbc bbe bbk bbo bbr bca bcb bcc bce bcj bck bco bcr be- bea beb bec bee bek beo ber bja bjc bjj bjk bjr bka bkb bkc bke bkk bko bkr boa bob boc boe boj bok boo bor bra brb bre brj brk bro brr c-- c-j caa cab cac cae caj cak cao car cba cbb cbc cbe cbj cbk cbo cbr cca ccb ccc cce ccj cck cco ccr ce- cea ceb cec cee cej cek ceo cer cja cjb cjc cjk cjr cka ckb ckc cko co- coa cob coc coe coj cok coo cor cra crb crc cre crj crk cro crr eaa eab eac eae eaj eak eao ear eba ebb ebc ebe ebj ebk ebo ebr ec- eca ecb ecc ece ecj eck eco ecr eea eeb eec eee eek eeo eer eja ejc ejo eka ekb ekc eke eko ekr eo- eoa eob eoc eoe eok eoo eor era erb erc ere erk ero err jaa jab jac jae jaj jak jao jar jba jbc jbj jbk jbo jbr jca jcb jcc jce jck jco jcr jea jeb jec jee jej jek jeo jer jja jjb jjc jjj jjk jjr jka jkb jkk jko jkr joa job joc joe joj jok joo jor jra jrb jrc jrk jro jrr ka- kaa kab kac kae kaj kak kao kar kba kbb kbc kbe kbk kbo kbr kca kcb kcc kce kck kcr ke- kea keb kec kee kek keo ker kjb kjc kje kjr kkb kkc kke kkk kkr koa kob koc koe kok koo kor kra krc krk kro krr oaa oab oac oae oaj oak oao oar ob- oba obb obc obe obj obk obo obr oc- oca ocb occ ocj ock oco ocr oea oeb oec oee oeo oer oja ojb ojc oje ojo oka okb okc oke okj okk oko okr oo- ooa oob ooc ook ooo oor or- ora orb orc ore ork oro orr ra- raa rab rac rae raj rak rao rar rba rbb rbc rbe rbk rbo rbr rca rcb rcc rce rcj rco rcr re- rea reb rec ree rek reo rer rja rjc rjk rjr rkb rkc rke rkk rko roa rob roc roe roj rok roo ror rra rrb rrc rrk rrr

a-ak a-be a-ok aaaa aaab aaac aaae aaar aaba aabb aabc aaca aacb aacc aace aack aaco aacr aaea aaec aaka aake aaoe aaoo aara aarc aare aaro abaa abab abac abae abaj abak abar abb- abba abbb abbe abbo abbr abca abcb abcc abcr abec abee aber aboa abob abok aboo abor abra abrc abro acaa acab acac acae acar acba acca accc acce acco ace- acea acec acek acer acke acoa acoe acor acr- acra acrc acre acro acrr aeac aecb aeer aeka aer- aera aerc aero ajab ajac ajak ajao ajar ajba ajee ajka ajob ajoo akaa akae akao akar akca akee aker akka akko akok akr- akra akre aoba aoca aoce aora aorb arab arac arae arak arar arba arbe arc- arca arce arco area arec aree arek areo arja arje arjo arka arke arko aroa arob aroe aroo aror arr- arra arrc arre arrk arro arrr baaa baak baar baba babb babe babo babr bac- baca bacc bace back baco baek baer baja bak- baka bake bako bakr bar- bara barb barc bare bark baro barr bbbb bbeb bbrc bcaa bcar bcbc bcca bccc bcec bcer bcor bcra beak bear beba bebb bebe bebo beca beck beeb beej beek beer beja beka beke beko beo- beok beor bera berc bere berk bero berr bjcc bjec bjoa boab boac boak boar boba bobb bobe bobo boca boce bock boco boea boec boee boeo boer bojo boka boke boko boob booc booe book boor bor- bora bore borj bork boro borr brab brac brae braj brak brao brca brcb brce brea breb brec bree brek breo brer brje brka brkb broa brob broc broe brok broo bror brrr c-bo caaa caab caac caba cabe cabo cac- caca cacc cace cack caco cacr caec caer caja caka cake caor cara carb carc care carj cark caro carr cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbka cbkj cbko cbkr cbre cbrj ccaa ccab ccac ccar ccba ccbc ccca cccb cccc ccee ccjo ccob ccoc ccra ccrc ccre ceac cear ceba cec- ceca cece ceco ceeb ceec ceja cejc ceke ceor cer- cera cerc cere cero cjar cjbc cjbk cjca cjcb cjcj cjob cjor cjrb cjrc cjrj ckac ckbc ckbe ckck ckco cker ckjr ckoa ckob ckoc ckoo ckor ckrc coak coba cobb cobe cobo coca coce cock coco cojo cok- coka coke coko coob cook cor- cora corb corc core cork coro corr crab crac craj crar crbc crca crcc crce crcr cre- crea creb crec cree creo crkc crob croc croe crok croo cror eaba eaca eacc eaec eara earb eare earo ebac ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ecaa ecac ecao ecar ecbc ecbe ecca eccb eccc ecce ecco ecka ecko eco- ecra ecrc ecrr eeca eeea eeee eeka eeke eeoc eera eerc eero ejer ejob ejoo eka- ekab ekco ekeb ekek eker ekka ekoa eoka eora eore erba erbb erbe erca ercc erce ereb erec erer erja erke erob eroc eroe eroo erra errc erre erro j-ro jaak jaar jaba jabo jabr jaca jacc jace jack jaco jaer jaja jaka jake jako jara jarc jare jark jaro jarr jbaa jbar jbob jcbc jccc jcrc jear