# Kelvin Din-Chin

def main():
    phone_number = input("Please enter a 10 number format as XXX-XXX-XXXX: ")
    parse_number(phone_number)

def parse_number(phone_number):

    new_number = ''

    alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

    for digits in phone_number:
        if not digits.isdigit():

            if digits in alphabet[0:3]:
                digits = '2'

            elif digits in alphabet[3:6]:
                digits = '3'

            elif digits in alphabet[6:9]:
                digits = '4'

            elif digits in alphabet[9:12]:
                digits = '5'

            elif digits in alphabet[12:15]:
                digits = '6'

            elif digits in alphabet[15:19]:
                digits = '7'

            elif digits in alphabet[19:21]:
                digits = '8'

            elif digits in alphabet[21:26]:
                digits = '9'

            new_number += digits
        else:
            new_number += digits

    print(new_number)

main()