You should write a program that reads the book you have downloaded. Program will request 4 characters from the user and will delete the words ending with this character. Program should continue to request character until the entered character is a letter. In addition, your program will find the 4 most occurred vowel in the text and will reverse words starting with these vowels. You should do this operation after you have deleted the words ending with the entered letters. Your program will also determine the occurrence of the most occurred vowels. At the end, program will save the new text into separate text file. For example, entered characters are k, l, m, n. First program will delete all words ending with these letters. It is assumed that the most occurred 4 vowels are a, e, i, u. Then, your program will reverse the words starting with these letters (e.g. apple-elppa, escaped-depacse, island-dnalsi, upon-nopu). Vowel a occurred 41903 times Vowel e occurred 30123 times Vowel i occurred 18439 times Vowel u occurred 10356 times This part of the text file will include the new text with deleted words ending with entered characters and reversed words starting with most occurred vowels. You are not allowed to use string.h library. You should allocate memory dynamically. All operations sh not be done in main() funct least one more function besides main(). You must use at