a-a a-b a-c aaa aab aac aad aak aar aaw ab- aba abb abc abd abk abr abw ac- aca acb acc acd ack acr acw ad- ada adb adc add adk adr adw aka akb akc akd akk akr akw ar- ara arb arc ard ark arr arw aw- awa awb awc awd awk awr aww baa bab bac bad bak bar baw bba bbb bbc bbd bbk bbr bbw bca bcb bcc bcd bck bcr bda bdb bdc bdd bdk bdr bdw bka bkb bkc bkk bkr bkw bra brb brd brk brr brw bwa bwb bwc bwd bwk bwr c-- caa cab cac cad cak car caw cba cbb cbc cbd cbk cbr cbw cca ccb ccc ccd cck ccr ccw cda cdb cdc cdd cdk cdr cdw cka ckb ckc ckd ckw cra crb crc crd crk crr crw cw- cwa cwb cwc cwd cwk cwr daa dab dac dad dak dar daw dba dbb dbc dbd dbk dbr dca dcb dcc dcd dck dcr dcw dda ddb ddc ddd ddk ddr ddw dka dkb dkc dkk dkr dkw dra drb drc drd drk drr drw dwa dwb dwc dwr dww ka- kaa kab kac kad kak kar kaw kba kbb kbc kbd kbk kbr kbw kca kcb kcc kcd kck kcr kda kdb kdc kdk kdr kkb kkc kkk kkr kra krc krd krk krr krw kw- kwa kwc kwd kwk kww ra- raa rab rac rad rak rar raw rba rbb rbc rbd rbk rbr rbw rca rcb rcc rcd rcr rcw rda rdb rdc rdd rdr rkb rkc rkk rra rrb rrc rrd rrk rrr rwa rwb rwc rwd rwr waa wab wac wad wak war waw wba wbb wbc wbd wbr wbw wca wcb wcc wcd wck wcr wcw wda wdb wdc wdr wka wkb wkc wkd wkr wkw wr- wra wrc wrd wrk wrr wrw wwa wwc wwd www

a-ak a-wa aaaa aaab aaac aaad aaar aaba aabb aabc aabd aabw aaca aacb aacc aacd aack aacr aada aadc aaka aara aarc aard aaww abaa abab abac abad abak abar abaw abb- abba abbb abbr abca abcb abcc abcd abcr abcw abda abra abrc abwa abwr acaa acab acac acad acar acba acca accc accd acda acdb acdc ackd ackw acr- acra acrc acrr acwa acww adaa adab adac adad adak adar adaw adba adbc adcc adda addc addd addr adra adwa akaa akar akca akka akr- akra akwa arab arac arad arak arar araw arba arc- arca arda ardc arka arr- arra arrc arrk arrr arwa awac awad awar awka awwa baaa baad baak baar baba babb babr bac- baca bacc back bada badb badd badr bak- baka bakr bar- bara barb barc bard bark barr baw- bawd bawk bbad bbbb bbdd bbrc bbwc bbwr bcaa bcar bcbc bcca bccc bcda bcra bd-r bdbc bddc brab brac brad brak braw brca brcb brcw brda brka brkb brrr bwaa c-cd caaa caab caac caba cac- caca cacc cack cacr cacw cada cadc cadd cadr cadw caka cara carb carc card cark carr cawk cbac cbar cbbc cbca cbcc cbcr cbdb cbdc cbka cbkr cbrd cbwa cbwd ccaa ccab ccac ccad ccar ccba ccbc ccca cccb cccc ccdc ccdr cckw ccra ccrc cd-r cdaa cdac cdad cdba cdda cddb cddr ckac ckbc ckck ckcw ckrc ckrd ckrw ckwd ckwr ckww crab crac crar craw crbc crca crcc crcr crda crdc crkc crwd cwac cwrw daab daad daar daba dabb daca dada daka dara darb darc dard dark darr dawa dawd dawk dawr dbar dbcc dcbc dcca dccb dccc dcdb dcra dcrk dddd ddrc dkba dkdc draa drab drac drad drak drar draw drba drbc drca drda drkw drra dwac dwad dwar dwbr dwcw dwdd dwkc dwrd dwrk dwrw dwww kaaa kaab kaak kaar kaba kabb kabc kabd kabr kabw kacb kacc kacd kacw kad- kada kadd kadr kaka kakc kakk kara karb kard kark karr karw kaw- kawa kawc kawk kaww kbaa kbab kbac kbad kbak kbar kbba kbbb kbbc kbbd kbbk kbbr kbbw kbca kbcb kbck kbcr kbcw kbdb kbdr kbkb kbkk kbkr kbkw kbra kbrb kbrc kbrd kbrk kbrw kbwa kbwb kbwc kbwd kbww kcaa kcab kcac kcad kcar kcaw kcba kcbc kcbd kcbk kcbr kcbw kcca kccb kccc kccd kcck kccr kcda kcdc kcdd kcdr kckc kckk kckr kcrc kcrr kcrw kcwa kcwb kcwc kcwd kcwk kcwr kdaa kdab kdac kdad kdak kdar kdbb kdbr kdca kdcc kdcd kdcr kddb kddc kddd kddk kddr kdka kdkb kdkd kdkk kdkr kdrb kdrw kdwa kdwd kkaa kkac kkar kkaw kkba kkbb kkbd kkbr kkcb kkcd kkck kkcr kkcw kkda kkdc kkdd kkkk kkrb kkrc kkrk kkrr kkwb kkwd kkwk krab krac krad krak krar kraw krba krbb krbd krbk krbr krbw krca krcb krcc krcd krcw krda krdc krdd krdr krka krkc krkd krkk krkr krkw krrb krrc krrk krrr krrw krwa krwb krwc krwk krwr kwab kwac kwad kwak kwar kwaw kwbc kwbw kwca kwcd kwck kwcr kwdc kwdd kwdk kwdr kwdw kwka kwkb kwkc kwkk kwkr kwkw kwrb kwrd kwrk kwrr kwrw kwwk kwwr raab raad raak raba rabb rabk rac- raca racc rack rada radc radd radr raka rakk rara rarb rark rawa rawk rawr raww rbbb rbbr rcac rcbc rccb rccc rcdc rcrd rdac rrad rrrr waaa waac waad waar waaw waba wabb wabc wabd wabk wabr wabw waca wacb wacc wacd wack wada wadb wadc wadd wadk wadr waka wakb wakd wakk wakr wakw war- wara warb warc ward wark warr warw wawa wawb wawc wawd wawk wbaa wbab wbac wbad wbak wbar wbbb wbbd wbbk wbbr wbbw wbca wbcb wbck wbcr wbcw wbdc wbdk wbdr wbka wbkb wbkk wbkr wbkw wbrb wbrc wbrd wbrk wbrr wbrw wbwb wbwc wcab wcad wcar wcba wcbc wcbd wcbr wcbw wcca wccb wccc wccd wcck wccr wccw wcda wcdb wcdc wcdd wcdk wcdw wcka wckb wckk wckr wckw wcra wcrb wcrc wcrk wcrr wcrw wcwa wcwb wcwc wdab wdac wdad wdak wdba wdbc wdbd wdbk wdbr wdca wdcb wdcc