Convert word to plural form.

toPlural "potato" == "potatoes"


toPlural "cat" == "cats"


toPlural "The Illustrated Man" == "The Illustrated Men"


toPlural "SHOUT" == "SHOUTS"

Convert word to singlular form.

toSingular "potatoes" == "potato"


toSingular "cats" == "cat"


toSingular "The Illustrated Men" == "The Illustrated Man"


toSingular "SHOUTS" == "SHOUT"