People sometimes give their phone numbers using one or more alphabetic characters. Create a program that converts the alphabetic characters to their corresponding numbers. For example an entry of NUMBER1 or number1 should return 686-2371. Assume only a 7-charcter entry can be input. Your output should be in the format XXX-XXXX. Below is the translation table from alphabet to number.
ABC: 2
DEF: 3
GHI: 4
JKL: 5
MNO: 6
PQRS: 7
TUV: 8
WXYZ: 9