uppac pupac uppac pupac ppuac ppuac upapc puapc uappc auppc paupc apupc upapc puapc uappc auppc paupc apupc ppauc ppauc papuc appuc papuc appuc uppca pupca uppca pupca ppuca ppuca upcpa pucpa ucppa cuppa pcupa cpupa upcpa pucpa ucppa cuppa pcupa cpupa ppcua ppcua pcpua cppua pcpua cppua upacp puacp uapcp aupcp paucp apucp upcap pucap ucpap cupap pcuap cpuap uacpp aucpp ucapp cuapp acupp caupp pacup apcup pcaup cpaup acpup capup upacp puacp uapcp aupcp paucp apucp upcap pucap ucpap cupap pcuap cpuap uacpp aucpp ucapp cuapp acupp caupp pacup apcup pcaup cpaup acpup capup ppacu ppacu papcu appcu papcu appcu ppcau ppcau pcpau cppau pcpau cppau pacpu apcpu pcapu cpapu acppu cappu pacpu apcpu pcapu cpapu acppu cappu
Note: these 'words' (valid or invalid) are all the permutations of the word uppac. These words are obtained by scrambling the letters in uppac.