a-a a-b a-c aaa aab aac aad aak aas ab- aba abb abc abd abk abs ac- aca acb acc acd ack acs ad- ada adb adc add adk ads aka akb akc akd akk aks as- asa asb asc asd ask ass baa bab bac bad bak bas bba bbb bbc bbd bbk bbs bca bcb bcc bcd bck bcs bda bdb bdc bdd bdk bds bka bkb bkc bkk bks bsa bsb bsc bsd bsk bss c-- caa cab cac cad cak cas cba cbb cbc cbd cbk cbs cca ccb ccc ccd cck ccs cda cdb cdc cdd cdk cds cka ckb ckc ckd cks csa csb csc csd csk css daa dab dac dad dak das dba dbb dbc dbd dbk dbs dca dcb dcc dcd dck dcs dda ddb ddc ddd ddk dds dka dkb dkc dkk dks dsa dsb dsc dsd dsk dss ka- kaa kab kac kad kak kas kba kbb kbc kbd kbk kbs kca kcb kcc kcd kck kcs kda kdb kdc kdk kds kkb kkc kkk kks ksa ksb ksc ksd ksk kss saa sab sac sad sak sas sba sbb sbc sbd sbk sbs sca scb scc scd sck scs sda sdb sdc sdd sdk sds sk- ska skb skc skd skk sks ss- ssa ssb ssc ssd ssk sss

a-ak aaaa aaab aaac aaad aaas aaba aabb aabc aabd aaca aacb aacc aacd aack aacs aada aadc aads aaka aasa aasc aasd aass abaa abab abac abad abak abas abb- abba abbb abbs abca abcb abcc abcd abcs abda abs- absa absd abss acaa acab acac acad acas acba acca accc accd accs acda acdb acdc acds ackd acks acsa acsc acsd acss adaa adab adac adad adak adas adba adbc adcc adcs adda addc addd adds adsa adss akaa akas akca akka aksa asaa asab asac asad asak asas asba asc- asca ascb ascc asda asds aska asks assa assc assd assk asss baaa baad baak baas baba babb babs bac- baca bacc back bacs bada badb badd bads bak- baka baks basa basc bask bass bbad bbas bbbb bbbs bbdd bcaa bcas bcbc bcbs bcca bccc bccs bcda bcds bcsa bcsc bcss bdbc bddc bdsd bsaa bsac bsas bsbd bscs bssc bssd c-cd caaa caab caac caas caba cabs cac- caca cacc cack cada cadc cadd cads caka casa casb casc casd cask cass cbac cbbc cbbs cbca cbcc cbcs cbdb cbdc cbds cbka cbsa cbsc ccaa ccab ccac ccad ccas ccba ccbc ccca cccb cccc cccs ccdc ccds ccsa ccsd ccss cdaa cdac cdad cdba cdcs cdda cddb cdss ckac ckbc ckck ckcs cksa cksb csaa csab csac csak csas cscb cscc cscd cscs csda csdb cska csks cssa cssd daab daad daas daba dabb dabs daca dacs dada dads daka daks dasa dasb dasc dasd dask dass dbas dbcc dbcs dbsa dbss dcas dcbc dcca dccb dccc dccs dcdb dcds dcsc dcss dddd ddss dkba dkdc dsac dsba dsbc dscc dscs dsda dssa dssc kaaa kaab kaak kaas kaba kabb kabc kabd kacb kacc kacd kacs kad- kada kadd kads kaka kakc kakk kaks kas- kasa kasb kasc kask kass kbaa kbab kbac kbad kbak kbas kbba kbbb kbbc kbbd kbbk kbbs kbca kbcb kbck kbcs kbdb kbds kbkb kbkk kbsa kbsb kbsk kbss kcaa kcab kcac kcad kcas kcba kcbc kcbd kcbk kcbs kcca kccb kccc kccd kcck kcda kcdc kcdd kcds kckc kckk kcsa kcsb kcsc kcsd kcss kdaa kdab kdac kdad kdak kdbb kdbs kdca kdcc kdcd kddb kddc kddd kddk kdka kdkb kdkd kdkk kdsc kdsd kdsk kdss kkaa kkac kkba kkbb kkbd kkbs kkcb kkcd kkck kkcs kkda kkdc kkdd kkkk kksa kksd kkss ksab ksac ksak ksas ksba ksbc ksbs ksca kscb ksck kscs ksdc ksdk ksds kska kskb kskd kskk ksks kssa ksss sa-c saab saac saad saak saas saba sabb sabc sabs saca sacc sacd sack sacs sada sadb sadc sadd sads saka sakb sakk saks sasa sasc sasd sask sass sbaa sbac sbas sbbs sbca sbcc sbcs sbds sbsa sbsd scaa scab scac scad scak scas scba sccc sccs scda scdc scds sck- scsa scsc scsd sdak sdba sdcc sddc sdds sdsc sdss skab skac skad sksd skss ssaa ssab ssac ssas ssca sscc sscs ssdc ssdd sssa sssb sssc ssss

-aaa- -abad aaaas aaadc aaasa aaass aabaa aabba aacbc aacsa aacsb aacss aadac aadas abaab ababa ababs abaca aback abacs abada abaka abasa abask abass abbac abbad abbas abcas abccc abcdb acaca acacb acack acads acass accad accas acdcs acsad acsdc adaba adada adads adaka adasa addas addsa ads-b akaba akasa akbas akkad akkas asaak asaba asabc asack asada asaka asasa asbad asbak asbca asdas askas asksa assab assac assad assas b-cas babak babas babbs babka babsk bacab bacas bacca back- backa backs badak badas bakka baksa basab basad basak basca baska basks bassa bckdk bsaba c-a-c c-kad ca-ca caaba cabas cacak cacas cacks cadac casas casca casks ccass ccccc cccsd csaba d-a-d daada daasa dabas dabba dabbs dacca dacka dacks dadas dadda dakka daksa dasca dasds daska dassa dback dccab ddddd k-b-d kaaba kaaks kabaa kabab kabad kabak kabas kabba kabsa kakas kakka kasab kasad kasak kasba kaska kassa kcdsa kdsbk saaba saabs saada saasa sabac sabak sabas sabca sabda sabsa sac-d sacas sacc- sacca sacks sacsa sadad sadak sadas sadda sakac sakka saksa sasak sasca sasda sasdk saska sassa sback scabs scada scads sccbc scdsb scsaa skabd skads sscac sssss

aaaaba ababda ababsa abacab abacas abacks abadas abakas abassa abbasa abbass abdabs abdasa abscss acadsb acasa ackack adabas adadds adassa adbass addada ads-ac akaska akassa akbaba akkaba ascaad askdad assads assaka baabaa baabda babkas bacaba badass badbad bassac bbbbbb caback cabasa cadaba cadca caddas cakcak casaba casbaa cascas cassab cssdca dababa dabaca dabaka dabdab dadaab dadada dasada kaback kabaka kabbad kadaba kadaka kadbak kakasd kakkad kakkak kasaba kasack kasasa kassab sabaka sabbac sabbas sacaba sacasa sacsac sadaba sadaka sadass sakaba sakada sascab sass-c sassak ssabsa

ab-dabs ababdas abadaba abassad abbasak abdabad absabad