- Write a C program myprog that prompts the user to enter an arbitrary string: - You are not allowed to use any standard string manipulation functions from . - You are only allowed to use pointers to work with the string input. - myprog must print each argument starting with the first character on the first line, two characters on the second line, etc. myprog must exclude all characters other than a through z and A through Z. For the parameters specified above, myprog mus produce the following output: - Use three test cases to verify the correctness of your code as follows: - C language - Have a nice day! - paraskevidekatriaphobia = Friday 13