Write a program that prompts the user for a four-digit, positive integer and then calls a function called reverse-digits ) to print the digits in reverse order on one line with no spaces between digits. It's not actually necessary to use the end parameter in the print () function, but you'll have to use either it or the sep parameter. Your output should look similar to this: 1 Enter a four-digit, positive integer: 1234 2 4321 If the input has trailing zeros, the reversed number will look a bit odd, but it's okay. 1 Enter a four-digit integer: 1200 0021