$22\mathrm{.}3)$ Used Return

Write a function named pluralize that consumes a string and returns that

string with an $"$s$"$ at the end $($so "dog" would become "dogs"$).$

Now, let's call that function and use its result for something useful.

Remember that calling a function evaluates$/$executes that function as an

expression. Also, remember that the result of calling a function is defined by

its return value.

Call your pluralize function and pass in the string "Dog" as the argument.

Assign the result of calling the function to a variable called noun $($notice

the use of the noun variable in the print function call$).$

At this point, if you run your program it should print "Dogs can pet other Dogs".

Finally, write a unit test at the bottom of your program to make sure your

function works on strings other than "Dog".

Notice that because this function returned a value, that value could be reused

multiple times.