pipes ippes ppies ppies ippes pipes pieps ipeps peips epips iepps eipps ppeis ppeis pepis eppis pepis eppis ipeps pieps iepps eipps peips epips pipse ippse ppise ppise ippse pipse pispe ipspe psipe spipe isppe sippe ppsie ppsie pspie sppie pspie sppie ipspe pispe isppe sippe psipe spipe piesp ipesp peisp episp iepsp eipsp pisep ipsep psiep spiep ispep sipep pesip epsip pseip speip espip sepip iespp eispp isepp siepp esipp seipp ppesi ppesi pepsi eppsi pepsi eppsi ppsei ppsei pspei sppei pspei sppei pespi epspi psepi spepi esppi seppi pespi epspi psepi spepi esppi seppi ipesp piesp iepsp eipsp peisp episp ipsep pisep ispep sipep psiep spiep iespp eispp isepp siepp esipp seipp pesip epsip pseip speip espip sepip
Note: these 'words' (valid or invalid) are all the permutations of the word pipes. These words are obtained by scrambling the letters in pipes.