Nothing too advanced please.. a program a beginner would write.

write a test program that prompts the user to enter a string and displays the num ber of letters in the string 6.21 (Phone keypads The international standard letterlnumber mapping for telephones is shown in Programming Exercise 4.15. Write a method that returns a number. given an uppercase letter, as follows: int get Number (char uppercaseLetter) Write a test program that prompts the user to enter a phone number as a string. The input number may contain letters. The program translates a letter (uppercase or lowercase) to a digit and leaves all other characters intact. Here is a sample run of the program: Enter a string: 1-800-Flowers Fenter 1-800-3569377