a-ak aaaa aaac aaad aaar aaas aaca aacc aacd aack aacr aacs aada aadc aads aaka aara aarc aard aars aasa aasc aasd aass acaa acac acad acar acas acca accc accd accs acda acdc acds ackd acks acr- acra acrc acrr acrs acsa acsc acsd acss adaa adac adad adak adar adas adcc adcs adda addc addd addr adds adra adrs adsa adsr adss akaa akar akas akca akka akr- akra aksa arac arad arak arar aras arc- arca arcs arda ardc ards arka arks arr- arra arrc arrk arrr arrs ars- arsa arsc arsd arsk asaa asac asad asak asar asas asc- asca ascc ascr asda asds aska askr asks asra asrc asrs assa assc assd assk assr asss c-cd caaa caac caas cac- caca cacc cack cacr cada cadc cadd cadr cads caka cara carc card cark carr cars casa casc casd cask casr cass ccaa ccac ccad ccar ccas ccca cccc cccs ccdc ccdr ccds ccra ccrc ccrs ccsa ccsd ccss cd-r cdaa cdac cdad cdcs cdda cddr cdrs cdss ckac ckck ckcs ckrc ckrd cksa crac crar cras crca crcc crcr crda crdc crkc crsa crss csaa csac csak csar csas cscc cscd cscr cscs csda csdr cska csks csra csrc csrd csrs cssa cssd cssr daad daar daas daca dacs dada dads daka daks dara darc dard dark darr dars dasa dasc dasd dask dass dcas dcca dccc dccs dcds dcra dcrk dcsc dcss dddd ddrc ddss dkdc draa drac drad drak drar dras drca drda drra drrs drsa dsac dscc dscr dscs dsda dsdr dsrc dsrr dssa dssc kaaa kaak kaar kaas kacc kacd kacs kad- kada kadd kadr kads kaka kakc kakk kaks kara kard kark karr kars kas- kasa kasc kask kasr kass kcaa kcac kcad kcar kcas kcca kccc kccd kcck kccr kcda kcdc kcdd kcdr kcds kckc kckk kckr kcrc kcrr kcrs kcsa kcsc kcsd kcsr kcss kdaa kdac kdad kdak kdar kdca kdcc kdcd kdcr kddc kddd kddk kddr kdka kdkd kdkk kdkr kdrs kdsc kdsd kdsk kdsr kdss kkaa kkac kkar kkcd kkck kkcr kkcs kkda kkdc kkdd kkkk kkrc kkrk kkrr kkrs kksa kksd kksr kkss krac krad krak krar kras krca krcc krcd krcs krda krdc krdd krdr krds krka krkc krkd krkk krkr krks krrc krrk krrr krrs krsa krsc krsd krsk krsr krss ksac ksak ksar ksas ksca ksck kscr kscs ksdc ksdk ksdr ksds kska kskd kskk kskr ksks ksra ksrr ksrs kssa kssr ksss raad raak raas rac- raca racc rack racs rada radc radd radr rads raka rakk rara rark rars rasa rasc rasd rask rass rcac rcas rccc rccs rcdc rcds rcrd rcsa rcsc rcsd rcss rdac rdas rkss rrad rras rrrr rsaa rscc rscs rsdd rsds rssa sa-c saac saad saak saar saas saca sacc sacd sack sacr sacs sada sadc sadd sadr sads saka sakk saks sara sarc sard sark sarr sars sasa sasc sasd sask sass scaa scac scad scak scar scas sccc sccs scda scdc scds sck- scr- scra scrc scrs scsa scsc scsd scsr sdak sdcc sddc sdds sdrc sdrs sdsc sdss skac skad skar skra sksd skss sras srcc srsd ssaa ssac ssas ssca sscc sscs ssdc ssdd ssra ssrc ssrs sssa sssc ssss