a-ak aaaa aaac aaad aaas aaca aacc aacd aack aacs aada aadc aads aaka aasa aasc aasd aass acaa acac acad acas acca accc accd accs acda acdc acds ackd acks acsa acsc acsd acss adaa adac adad adak adas adcc adcs adda addc addd adds adsa adss akaa akas akca akka aksa asaa asac asad asak asas asc- asca ascc asda asds aska asks assa assc assd assk asss c-cd caaa caac caas cac- caca cacc cack cada cadc cadd cads caka casa casc casd cask cass ccaa ccac ccad ccas ccca cccc cccs ccdc ccds ccsa ccsd ccss cdaa cdac cdad cdcs cdda cdss ckac ckck ckcs cksa csaa csac csak csas cscc cscd cscs csda cska csks cssa cssd daad daas daca dacs dada dads daka daks dasa dasc dasd dask dass dcas dcca dccc dccs dcds dcsc dcss dddd ddss dkdc dsac dscc dscs dsda dssa dssc kaaa kaak kaas kacc kacd kacs kad- kada kadd kads kaka kakc kakk kaks kas- kasa kasc kask kass kcaa kcac kcad kcas kcca kccc kccd kcck kcda kcdc kcdd kcds kckc kckk kcsa kcsc kcsd kcss kdaa kdac kdad kdak kdca kdcc kdcd kddc kddd kddk kdka kdkd kdkk kdsc kdsd kdsk kdss kkaa kkac kkcd kkck kkcs kkda kkdc kkdd kkkk kksa kksd kkss ksac ksak ksas ksca ksck kscs ksdc ksdk ksds kska kskd kskk ksks kssa ksss sa-c saac saad saak saas saca sacc sacd sack sacs sada sadc sadd sads saka sakk saks sasa sasc sasd sask sass scaa scac scad scak scas sccc sccs scda scdc scds sck- scsa scsc scsd sdak sdcc sddc sdds sdsc sdss skac skad sksd skss ssaa ssac ssas ssca sscc sscs ssdc ssdd sssa sssc ssss