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