Ans to the q. no: 4

# Bangladesh Country code: +880
# India Country code: +91
# Pakistan Country code: +92
# Usa Country code: +1
# UK country code +44

# number to country
def get_country(number):
    if number[0:4] == '+880' or number[0:3] == '880':
        return "Bangladesh"
    elif number[0:3] == '+91' or number[0:2] == '91':
        return "India"
    elif number[0:3] == '+92' or number[0:2] == '92':
        return "Pakistan"
    elif number[0:2] == '+1' or number[0:1] == '1':
        return "United States (US)"
    elif number[0:3] == '+44' or number[0:2] == '44':
        return "United Kingdom (UK)"
    else:
        return "Unknown Country"


phone_numbers = open('phone-numbers.txt', 'r')
Lines = phone_numbers.readlines()

count = 0
for line in Lines:
    count += 1
    country = get_country(line.strip())
    print("Phone Number: {} country: {}".format(line.strip(), country))