python program; can't use import anything for it.

5. Alphabetic Telephone Number Translator Many companies use 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 I = 4 J,K,and L = 5 M, N, and O = 6 P,Q, R, and S = 7 T,U,and V = 8 W,X,Y,and Z = 9 Write a program that asks the user to enter a 10-character telephone number in the for- mat XXX-XXX-XXXX. The application should display the telephone number with any alphabetic characters that appeared in the original translated to their numeric equiva- lent. For example, if the user enters 555-GET-FOOD, the application should display 555-438-3663