Problem Description: I like odd numbers a lot! I know it's your exam but you have to do me a little favor! I will give you a random integer number and you have to make it a Purified Odd Number. A Purified Odd Number is a number where every digit is an odd number. For more clarification, you may observe the sample input-output relations. Sample Input: 1234 Sample Output: 13 Sample Input: 987654 Sample Output: 975