Tom wants to find a number so that the sum of the digits of a two-digit number is 7. When reversing the digits, the number should increase by 27. He writes a computer program to find the number. How will the program represent the number? A is used to represent an unknown number.

Write a program that prompts the user to input a string. the program then uses the function substr to remove all the vowels from the string. for example, if str = "there", then after removing all the vowels, str = "thr". after removing all the vowels, output the string. your program must contain a function to remove all the vowels and a function to determine whether a character is a vowel.