program that asks the user to enter a 1O-character telephone number in the format XXX-XXXXXXX.

Many companies use the telephone numbers like 555-GET-FOOD
so the number is easier for their customers to remember. On a standard
telephone, the alphabetic letters are mapped to numbers in the following
fashion:

A, B, and C=2

D, E, and F=3

G, H, and 1=4

J, K, and L=5

M, N, and O=6

P, Q, R, and 5= 7

T, U, and V=8

W, X, Y, and Z= 9

Write a program that asks the user to enter a 1O-character telephone number in the format XXX-XXXXXXX. The application should display the
telephone number with any alphabetic characters that appeared in the original
translated to their numeric equivalent. For example, ¡f the user enters
555-GET-FOOD the application should display 555-438-3663.

You are required to use functions. Design will be included in grading.
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