abacs baacs aabcs aabcs baacs abacs abcas bacas acbas cabas bcaas cbaas aacbs aacbs acabs caabs acabs caabs bacas abcas bcaas cbaas acbas cabas abasc baasc aabsc aabsc baasc abasc absac basac asbac sabac bsaac sbaac aasbc aasbc asabc saabc asabc saabc basac absac bsaac sbaac asbac sabac abcsa bacsa acbsa cabsa bcasa cbasa absca basca asbca sabca bsaca sbaca acsba casba ascba sacba csaba scaba bcsaa cbsaa bscaa sbcaa csbaa scbaa aacsb aacsb acasb caasb acasb caasb aascb aascb asacb saacb asacb saacb acsab casab ascab sacab csaab scaab acsab casab ascab sacab csaab scaab bacsa abcsa bcasa cbasa acbsa cabsa basca absca bsaca sbaca asbca sabca bcsaa cbsaa bscaa sbcaa csbaa scbaa acsba casba ascba sacba csaba scaba
Note: these 'words' (valid or invalid) are all the permutations of the word abacs. These words are obtained by scrambling the letters in abacs.