yipes iypes ypies pyies ipyes piyes yieps iyeps yeips eyips ieyps eiyps ypeis pyeis yepis eypis peyis epyis ipeys pieys iepys eipys peiys epiys yipse iypse ypise pyise ipyse piyse yispe iyspe ysipe syipe isype siype ypsie pysie yspie sypie psyie spyie ipsye pisye ispye sipye psiye spiye yiesp iyesp yeisp eyisp ieysp eiysp yisep iysep ysiep syiep isyep siyep yesip eysip yseip syeip esyip seyip iesyp eisyp iseyp sieyp esiyp seiyp ypesi pyesi yepsi eypsi peysi epysi ypsei pysei yspei sypei psyei spyei yespi eyspi ysepi syepi esypi seypi pesyi epsyi pseyi speyi espyi sepyi ipesy piesy iepsy eipsy peisy episy ipsey pisey ispey sipey psiey spiey iespy eispy isepy siepy esipy seipy pesiy epsiy pseiy speiy espiy sepiy
Note: these 'words' (valid or invalid) are all the permutations of the word yipes. These words are obtained by scrambling the letters in yipes.