mumms ummms mmums mmums ummms mumms mumms ummms mmums mmums ummms mumms mmmus mmmus mmmus mmmus mmmus mmmus ummms mumms ummms mumms mmums mmums mumsm ummsm mmusm mmusm ummsm mumsm musmm umsmm msumm smumm usmmm summm mmsum mmsum msmum smmum msmum smmum umsmm musmm usmmm summm msumm smumm mumsm ummsm mmusm mmusm ummsm mumsm musmm umsmm msumm smumm usmmm summm mmsum mmsum msmum smmum msmum smmum umsmm musmm usmmm summm msumm smumm mmmsu mmmsu mmmsu mmmsu mmmsu mmmsu mmsmu mmsmu msmmu smmmu msmmu smmmu mmsmu mmsmu msmmu smmmu msmmu smmmu mmsmu mmsmu msmmu smmmu msmmu smmmu ummsm mumsm ummsm mumsm mmusm mmusm umsmm musmm usmmm summm msumm smumm umsmm musmm usmmm summm msumm smumm mmsum mmsum msmum smmum msmum smmum
Note: these 'words' (valid or invalid) are all the permutations of the word mumms. These words are obtained by scrambling the letters in mumms.