cupel ucpel cpuel pcuel upcel pucel cuepl ucepl ceupl ecupl uecpl eucpl cpeul pceul cepul ecpul pecul epcul upecl puecl uepcl eupcl peucl epucl cuple ucple cpule pcule upcle pucle culpe uclpe clupe lcupe ulcpe lucpe cplue pclue clpue lcpue plcue lpcue uplce pulce ulpce lupce pluce lpuce cuelp ucelp ceulp eculp ueclp euclp culep uclep cluep lcuep ulcep lucep celup eclup cleup lceup elcup lecup uelcp eulcp ulecp luecp elucp leucp cpelu pcelu ceplu ecplu peclu epclu cpleu pcleu clpeu lcpeu plceu lpceu celpu eclpu clepu lcepu elcpu lecpu pelcu eplcu plecu lpecu elpcu lepcu upelc puelc ueplc euplc peulc epulc uplec pulec ulpec lupec pluec lpuec uelpc eulpc ulepc luepc elupc leupc peluc epluc pleuc lpeuc elpuc lepuc
Note: these 'words' (valid or invalid) are all the permutations of the word cupel. These words are obtained by scrambling the letters in cupel.