mamma ammma mmama mmama ammma mamma mamma ammma mmama mmama ammma mamma mmmaa mmmaa mmmaa mmmaa mmmaa mmmaa ammma mamma ammma mamma mmama mmama mamam ammam mmaam mmaam ammam mamam maamm amamm maamm amamm aammm aammm mmaam mmaam mamam ammam mamam ammam amamm maamm aammm aammm maamm amamm mamam ammam mmaam mmaam ammam mamam maamm amamm maamm amamm aammm aammm mmaam mmaam mamam ammam mamam ammam amamm maamm aammm aammm maamm amamm mmmaa mmmaa mmmaa mmmaa mmmaa mmmaa mmama mmama mamma ammma mamma ammma mmama mmama mamma ammma mamma ammma mmama mmama mamma ammma mamma ammma ammam mamam ammam mamam mmaam mmaam amamm maamm aammm aammm maamm amamm amamm maamm aammm aammm maamm amamm mmaam mmaam mamam ammam mamam ammam
Note: these 'words' (valid or invalid) are all the permutations of the word mamma. These words are obtained by scrambling the letters in mamma.