a-a a-b a-c aaa aab aac aad aar aas ab- aba abb abc abd abr abs ac- aca acb acc acd acr acs ad- ada adb adc add adr ads ar- ara arb arc ard arr ars as- asa asb asc asd asr ass baa bab bac bad bar bas bba bbb bbc bbd bbr bbs bca bcb bcc bcd bcr bcs bda bdb bdc bdd bdr bds bra brb brd brr brs bsa bsb bsc bsd bsr bss c-- caa cab cac cad car cas cba cbb cbc cbd cbr cbs cca ccb ccc ccd ccr ccs cda cdb cdc cdd cdr cds cra crb crc crd crr crs csa csb csc csd csr css daa dab dac dad dar das dba dbb dbc dbd dbr dbs dca dcb dcc dcd dcr dcs dda ddb ddc ddd ddr dds dra drb drc drd drr drs dsa dsb dsc dsd dsr dss ra- raa rab rac rad rar ras rba rbb rbc rbd rbr rbs rca rcb rcc rcd rcr rcs rda rdb rdc rdd rdr rds rra rrb rrc rrd rrr rrs rsa rsb rsc rsd rsr rss saa sab sac sad sar sas sba sbb sbc sbd sbr sbs sca scb scc scd scr scs sda sdb sdc sdd sdr sds sr- sra srb src srd srr srs ss- ssa ssb ssc ssd ssr sss

aaaa aaab aaac aaad aaar aaas aaba aabb aabc aabd aaca aacb aacc aacd aacr aacs aada aadc aads aara aarc aard aars aasa aasc aasd aass abaa abab abac abad abar abas abb- abba abbb abbr abbs abca abcb abcc abcd abcr abcs abda abra abrc abrs abs- absa absd abss acaa acab acac acad acar acas acba acca accc accd accs acda acdb acdc acds acr- acra acrc acrr acrs acsa acsc acsd acss adaa adab adac adad adar adas adba adbc adcc adcs adda addc addd addr adds adra adrs adsa adsr adss arab arac arad arar aras arba arbs arc- arca arcs arda ardc ards arr- arra arrc arrr arrs ars- arsa arsc arsd asaa asab asac asad asar asas asba asc- asca ascb ascc ascr asda asds asra asrc asrs assa assc assd assr asss baaa baad baar baas baba babb babr babs bac- baca bacc bacs bada badb badd badr bads bar- bara barb barc bard barr bars basa basc bass bbad bbas bbbb bbbs bbdd bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcda bcds bcra bcrs bcsa bcsc bcss bd-r bdbc bddc bdsd brab brac brad bras brca brcb brda brds brrr brrs brsb brsr bsaa bsac bsas bsbd bscs bsra bsrd bssc bssd c-cd caaa caab caac caas caba cabs cac- caca cacc cacr cada cadc cadd cadr cads cara carb carc card carr cars casa casb casc casd casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbdb cbdc cbds cbrd cbsa cbsc ccaa ccab ccac ccad ccar ccas ccba ccbc ccca cccb cccc cccs ccdc ccdr ccds ccra ccrc ccrs ccsa ccsd ccss cd-r cdaa cdac cdad cdba cdcs cdda cddb cddr cdrs cdss crab crac crar cras crbc crca crcc crcr crda crdc crsa crss csaa csab csac csar csas cscb cscc cscd cscr cscs csda csdb csdr csra csrc csrd csrs cssa cssd cssr daab daad daar daas daba dabb dabs daca dacs dada dads dara darb darc dard darr dars dasa dasb dasc dasd dass dbar dbas dbcc dbcs dbrs dbsa dbss dcas dcbc dcca dccb dccc dccs dcdb dcds dcra dcsc dcss dddd ddrc ddss draa drab drac drad drar dras drba drbc drca drda drra drrs drsa dsac dsba dsbc dscc dscr dscs dsda dsdr dsrc dsrr dssa dssc raab raad raas raba rabb rabs rac- raca racc racs rada radc radd radr rads rara rarb rars rasa rasc rasd rass rbbb rbbr rbbs rbds rbsd rbss rcac rcas rcbc rccb rccc rccs rcdc rcds rcrd rcsa rcsc rcsd rcss rdac rdas rrad rras rrrr rsaa rscc rscs rsdd rsds rssa sa-c saab saac saad saar saas saba sabb sabc sabr sabs saca sacc sacd sacr sacs sada sadb sadc sadd sadr sads sara sarc sard sarr sars sasa sasc sasd sass sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbds sbsa sbsd scaa scab scac scad scar scas scba sccc sccs scda scdc scds scr- scra scrc scrs scsa scsc scsd scsr sdba sdcc sddc sdds sdrc sdrs sdsc sdss sras srbc srcc srsd ssaa ssab ssac ssas ssbr ssca sscc sscs ssdc ssdd ssra ssrc ssrs sssa sssb sssc ssss

-aaa- -abad aaaas aaadc aaarc aaasa aaass aabaa aabba aabra aacbc aacsa aacsb aacss aadac aadas aasra abaab ababa ababs abaca abacs abada abara abasa abass abbac abbad abbar abbas abbrs abcas abccc abcdb abrac abrad abrar abras absar acaca acacb acads acar- acara acard acars acass accad accas accra accrd acdcs acrab acsad acsdc adaba adada adads adara adars adasa addas addra addsa adrad adrar adras ads-b ar-ab ara-c arab- araba arabs araca arada arads arara arars arass arbab arbar arbas arcas ardab ardas ardra arras arsac asaba asabc asada asara asasa asbad asbca ascar asdas asrar assab assac assad assas b-cas baard baars babar babas babbs babra bacab bacar bacas bacca badar badas badra baraa barab barac barad barar baras barba barbs barca barcs barda bards barra barrs barsa barss basab basad basar basca basra bassa bbsrc braas braca bracc bracs brada brads brard brasa brasc brass brdda brrar brrrr bsaba c-a-c ca-ca caaba cabas cabra cacas cadac cadar caddr cadra caraa carab carac carad caras carb- carbs carda cards carra carrs casar casas casca cbars cbrsd ccass ccccc cccsd craba crabb crabs crada cradd crars crass csaba csars cssra d-a-d d-rad daada daara daasa dabar dabas dabba dabbs dabra dacca dadar dadas dadda dadra daraa darab darba darbs darcs darda dards darra darrs darss dasar dasca dasds dassa dccab ddddd draba drabs draca dracs ra-ra raaba raads raard raasa rabab rabac rabad rabas rabba rabda racsa radar radas rasac rasar