a-a a-b a-c aaa aab aac aad aak aan aao aar ab- aba abb abc abd abk abn abo abr ac- aca acb acc acd ack acn aco acr ad- ada adb adc add adk adn ado adr aka akb akc akd akk akn ako akr an- ana anb anc and ank ann ano anr aoa aob aoc aod aok aon aoo aor ar- ara arb arc ard ark arn aro arr baa bab bac bad bak ban bao bar bba bbb bbc bbd bbk bbn bbo bbr bca bcb bcc bcd bck bcn bco bcr bda bdb bdc bdd bdk bdo bdr bka bkb bkc bkk bkn bko bkr bna bnb bnc bnd bnk bnn bno bnr boa bob boc bod bok bon boo bor bra brb brd brk brn bro brr c-- caa cab cac cad cak can cao car cba cbb cbc cbd cbk cbn cbo cbr cca ccb ccc ccd cck ccn cco ccr cda cdb cdc cdd cdk cdn cdo cdr cka ckb ckc ckd cko cn- cna cnb cnc cnd cnn cno cnr co- coa cob coc cod cok con coo cor cra crb crc crd crk crn cro crr daa dab dac dad dak dan dao dar dba dbb dbc dbd dbk dbn dbo dbr dca dcb dcc dcd dck dcn dco dcr dda ddb ddc ddd ddk ddn ddo ddr dka dkb dkc dkk dko dkr dna dnb dnc dnd dnk dnn dno dnr doa dob doc dod dok don doo dor dra drb drc drd drk drn dro drr ka- kaa kab kac kad kak kan kao kar kba kbb kbc kbd kbk kbn kbo kbr kca kcb kcc kcd kck kcn kcr kda kdb kdc kdk kdo kdr kkb kkc kkk kkn kkr kn- kna knc knd knk knn kno knr koa kob koc kod kok kon koo kor kra krc krd krk krn kro krr naa nab nac nad nak nan nao nar nba nbb nbc nbd nbk nbn nbo nbr nca ncb ncc ncd nck ncn nco ncr nda ndb ndc ndd ndk ndn ndo ndr nka nkc nkk nkn nko nkr nna nnb nnc nnk nnn nno no- noa nob noc nod nok non noo nor nra nrb nrc nrd nrk nrn nro nrr oaa oab oac oad oak oan oao oar ob- oba obb obc obd obk obn obo obr oc- oca ocb occ ocd ock ocn oco ocr oda odb odc odd odn odo odr oka okb okc okd okk oko okr on- ona onb onc ond onk onn ono onr oo- ooa oob ooc ood ook oon ooo oor or- ora orb orc ord ork orn oro orr ra- raa rab rac rad rak ran rao rar rba rbb rbc rbd rbk rbn rbo rbr rca rcb rcc rcd rcn rco rcr rda rdb rdc rdd rdn rdo rdr rkb rkc rkk rko rna rnb rnc rnd rnn rno rnr roa rob roc rod rok ron roo ror rra rrb rrc rrd rrk rrn rrr

-ana a-ak a-do a-ok aaaa aaab aaac aaad aaan aaar aaba aabb aabc aabd aaca aacb aacc aacd aack aacn aaco aacr aada aadc aaka aana aand aaon aaoo aara aarc aard aaro abaa abab abac abad abak aban abar abb- abba abbb abbo abbr abca abcb abcc abcd abcn abcr abda abdo aboa abob abod abok abon aboo abor abra abrc abro acaa acab acac acad acan acar acba acca accc accd acco acda acdb acdc ackd acoa acod acon acor acr- acra acrc acro acrr adaa adab adac adad adak adan adao adar adba adbc adcc adda addc addd addn addo addr adna adob adoc adod adok adon adoo ador adra adro akaa akan akao akar akca akdn akka akko akna akok akon akr- akra ana- anaa anab anac anad anak anan anao anar anba anbb anbo anca ancc anco and- anda ando andr ank- anka anko anna annb anno ano- anoa anod anon anor anrc aoba aoca aonb aono aora aorb aorn arab arac arad arak aran arar arba arc- arca arco arda ardc ardo arka arko arna arnd arnk arno aroa arob arod aron aroo aror arr- arra arrc arrk arro arrr baaa baad baak baan baar baba babb babo babr bac- baca bacc back bacn baco bada badb badd bado badr bak- baka bako bakr bana banc band bank bann bano banr baon bar- bara barb barc bard bark barn baro barr bbad bbbb bbdd bbdo bbrc bcaa bcar bcbc bcca bccc bcda bcor bcra bd-r bdbc bddc bdna bnoc bnor bnrr boab boac boad boak boan boar boba bobb bobo boca bock boco boda bodb bodo boka bokn boko bona bonc bond bonk bonn bono boob booc bood book boon boor bor- bora bord bork born boro borr brab brac brad brak bran brao brca brcb brda brdo brka brkb brna brno broa brob broc brod brok bron broo bror brrr c-bo c-cd caaa caab caac caan caba cabo cac- caca cacc cack caco cacr cada cadc cadd cado cadr caka cana canc cand cank cann cano caod caor cara carb carc card cark carn caro carr cbac cbar cbbc cbca cbcc cbcn cbcr cbdb cbdc cbdn cbdo cbka cbkn cbko cbkr cbna cbnd cbrd cbrn ccaa ccab ccac ccad ccar ccba ccbc ccbn ccca cccb cccc ccdc ccdn ccdr ccna ccnb ccnc ccnr ccob ccoc ccod ccra ccrc cd-r cdaa cdac cdad cdba cdda cddb cddr cdna cdnb cdnc cdon ckac ckan ckbc ckck ckco ckdo cknb cknc ckoa ckob ckoc ckoo ckor ckrc ckrd cnaa cnac cnbc cnco cnda cndd cnna cnrc cnrr coad coak coan coba cobb cobo coca cock coco coda codd cok- coka coko con- cona conc cond conk conn cono coob cood cook coon cor- cora corb corc cord cork corn coro corr crab crac cran crar crbc crca crcc crcr crda crdc crkc crna crob croc crod crok cron croo cror d-bo d-na daab daad daan daar daba dabb dabo daca dada dado daka dako dana