a-a a-b a-c aaa aab aac aak aao aar aaw ab- aba abb abc abk abo abr abw ac- aca acb acc ack aco acr acw aka akb akc akk ako akr akw aoa aob aoc aok aoo aor aow ar- ara arb arc ark aro arr arw aw- awa awb awc awk awo awr aww baa bab bac bak bao bar baw bba bbb bbc bbk bbo bbr bbw bca bcb bcc bck bco bcr bka bkb bkc bkk bko bkr bkw boa bob boc bok boo bor bow bra brb brk bro brr brw bwa bwb bwc bwk bwo bwr c-- caa cab cac cak cao car caw cba cbb cbc cbk cbo cbr cbw cca ccb ccc cck cco ccr ccw cka ckb ckc cko ckw co- coa cob coc cok coo cor cow cra crb crc crk cro crr crw cw- cwa cwb cwc cwk cwo cwr ka- kaa kab kac kak kao kar kaw kba kbb kbc kbk kbo kbr kbw kca kcb kcc kck kcr kkb kkc kkk kkr koa kob koc kok koo kor kow kra krc krk kro krr krw kw- kwa kwc kwk kwo kww oaa oab oac oak oao oar oaw ob- oba obb obc obk obo obr obw oc- oca ocb occ ock oco ocr ocw oka okb okc okk oko okr okw oo- ooa oob ooc ook ooo oor oow or- ora orb orc ork oro orr owa owb owc owk owo oww ra- raa rab rac rak rao rar raw rba rbb rbc rbk rbo rbr rbw rca rcb rcc rco rcr rcw rkb rkc rkk rko roa rob roc rok roo ror row rra rrb rrc rrk rrr rwa rwb rwc rwr waa wab wac wak wao war waw wba wbb wbc wbo wbr wbw wca wcb wcc wck wco wcr wcw wka wkb wkc wko wkr wkw woa wob woc wok woo wor wow wr- wra wrc wrk wro wrr wrw wwa wwc wwo www

a-ak a-ok a-wa aaaa aaab aaac aaar aaba aabb aabc aabw aaca aacb aacc aack aaco aacr aaka aaoo aaow aara aarc aaro aaww abaa abab abac abak abar abaw abb- abba abbb abbo abbr abca abcb abcc abcr abcw aboa abob abok aboo abor abow abra abrc abro abwa abwr acaa acab acac acar acba acca accc acco ackw acoa acor acow acr- acra acrc acro acrr acwa acww akaa akao akar akca akka akko akok akr- akra akwa aoba aoca aora aorb arab arac arak arar araw arba arc- arca arco arka arko aroa arob aroo aror arow arr- arra arrc arrk arro arrr arwa awac awar awka awoo awow awro awwa baaa baak baar baba babb babo babr bac- baca bacc back baco bak- baka bako bakr bar- bara barb barc bark baro barr baw- bawk bbbb bbrc bbwc bbwr bcaa bcar bcbc bcca bccc bcor bcra boab boac boak boar boba bobb bobo bobw boca bock boco boka boko boob booc book boor boow bor- bora bork boro borr borw bowa bowk bowr brab brac brak brao braw brca brcb brcw brka brkb broa brob broc brok broo bror brow brrr bwaa bwoc c-bo caaa caab caac caba cabo cac- caca cacc cack caco cacr cacw caka caor cara carb carc cark caro carr cawk cbac cbar cbbc cbca cbcc cbcr cbka cbko cbkr cbwa ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cckw ccob ccoc ccow ccra ccrc ckac ckbc ckck ckco ckcw ckoa ckob ckoc ckoo ckor ckrc ckrw ckwr ckww coak coba cobb cobo coca cock coco cok- coka coko coob cook cor- cora corb corc cork coro corr crab crac crar craw crbc crca crcc crcr crkc crob croc crok croo cror crow cwac cwrw kaaa kaab kaak kaar kaba kabb kabc kabo kabr kabw kacb kacc kaco kacw kaka kakc kakk kako kaoa kaoc kaok kaor kaow kara karb kark karo karr karw kaw- kawa kawc kawk kawo kaww kbaa kbab kbac kbak kbar kbba kbbb kbbc kbbk kbbo kbbr kbbw kbca kbcb kbck kbco kbcr kbcw kbkb kbkk kbko kbkr kbkw kboa kbob kboc kbok kboo kbow kbra kbrb kbrc kbrk kbro kbrw kbwa kbwb kbwc kbww kcaa kcab kcac kcar kcaw kcba kcbc kcbk kcbr kcbw kcca kccb kccc kcck kccr kckc kckk kcko kckr kcob kcor kcow kcrc kcro kcrr kcrw kcwa kcwb kcwc kcwk kcwr kkaa kkac kkar kkaw kkba kkbb kkbo kkbr kkcb kkck kkco kkcr kkcw kkkk kkoa kkob kkoo kkor kkow kkrb kkrc kkrk kkro kkrr kkwb kkwk koab koac koak koar koba kobb kobc kobk kobo kobr koca kocb kock kocw koka kokb kokc kokk koko kokr koob kooc kook kooo koor kora korb korc kork koro korr kowa kowb kowr krab krac krak krar kraw krba krbb krbk krbr krbw krca krcb krcc krco krcw krka krkc krkk krko krkr krkw kroa krob kroc krok kroo kror krow krrb krrc krrk krro krrr krrw krwa krwb krwc krwk krwr kwab kwac kwak kwar kwaw kwbc kwbw kwca kwck kwcr kwka kwkb kwkc kwkk kwkr kwkw kwoa kwoc kwok kwor kwow kwrb kwrk kwro kwrr kwrw kwwk kwwr oara obak obba obbo obkb obok obor obra obro ocab ocac ocak ocbc occa occc ocra ocro ocrr okak okka okko okok okor okra okro ooaa ooak ooba oocr oooo oora orab orac orak orao orar orba orbb orbo orca orco orka orko oro- orok oror orra orro orwa orwo owar owow owwa raab raak raba rabb rabk rabo rac- raca racc rack raco raka rakk raob raoc raok rara rarb rark raro rawa rawk rawr raww rbbb rbbr rcac rcbc rcbo rccb rccc roab roak roar rob- roba robb robo roca rocc rock roco roka rokk roko rokr roob rook roor rora rorc rork roro rowa rowb rowk rowr roww rrrr waaa waac waao waar waaw waba wabb wabc wabk wabo wabr wabw waca wacb wacc wack waco waka wakb wakk wako wakr wakw waob waoc waok waoo waor waow war- wara warb