Problem 4: Telephone Digits To make telephone numbers easier to remember, some companies use letters to show their telephone number. For example, the telephone number 438-5626 can be shown as GET-LOAN. In some cases, to make a telephone number meaningful, companies might use more than seven letters. For example, 225- 5466 can be displayed as CALL-HOME, which uses eight letters. Write a Java program that prompts the user to enter a telephone number expressed in letters and outputs the corresponding telephone number in digits. If the user enters more than eight letters, then process only the first seven letters. Also, output the - (hyphen) after the third digit. Allow the user to use uppercase and lowercase letters, as well as spaces between words. Moreover, your program should process as many telephone numbers as the user wants. Sample Input/Output Enter Y/y to convert a telephone number form letters to digits. Enter any other letter to terminate the program. Enter a telephone number using letters: GETLOAN The correspponding telephone number is: 438-5626 To process another telephone number, enter Y/y Enter any other letter to terminate the program. Enter a telephone number using letters: CALLHOME The correspponding telephone number is: 225-5466 To process another telephone number, enter Y/y Enter any other letter to terminate the program