Simple Python Function

I need someone to write a simple python program that creates a function. I don't have a time limit but it probably won't take too long. Instructions: Write a function that takes a whole number as parameter and returns a string containing the number spelled out in English. For example, the function call: spell (123) will return the string: one hundred twenty three Your function must work for any whole number whose value is between -999,999,999 and 999,999,999. Of course, the numbers will not have commas in Python. In order to save time, work through your program on paper before attempting to write it in Python. Start by thinking of helpful functions that can assist you in writing your spell() function. Make sure that you write and test just ONE function at a time! 1) No function can be longer than 30 lines. See program guidelines 2) Your program can have no duplicate code. 3) You must use the modulus operator (%) or the divmod() function. 4) Every function must have a comment telling what the function does with its parameter(s) and what (if anything) it returns.