Credit Card Number Extraction

Problem Statement

The company ABC is into banking services. The company has this requirement where it receives a request string, and we need to extract the credit card number from the request string.

Credit card number is a 16 digit number.

Now, the first character in the request string is a flag value that determines the position of the credit card number in the string. If the first character is A, then the credit card number starts from 12th character in the request string. Or, if the first character is B, then the credit card number starts from 14th character in the request string. Or, if the first character does not match the previous two cases, then return an empty string for the credit card number.

Input

The first line of input is a string: request, representing the request string to the company ABC.

Output

Print the extracted credit card number.

As is

The boilerplate code is already there to read the inputs from user, in the main() function, and to print the value returned by the extractCreditCardNumber() function. Do not edit this code.

To do ✍

extractCreditCardNumber() has one parameter: request. Write code inside the function body to extract the credit card number, and return the same.

Example 1

Test input

A12745122214606123456780000F8BCA47852

Test output

4606123456780000

Explanation

Since the first character is A, credit card number starts from 12th character index=11 in the request string.

Example 2

Test input

B1800745122214606123456781200F8BCA47852FEC029AB85

Test output

4606123456781200

Explanation

Since the first character is B, credit card number starts from 14th character index=13 in the request string.

Example 3

Test input

81800745122214606123456780000F8BCA47852FEC029AB85

Test output

Explanation

Since the first character is neither A nor B, the resulting credit card number is an empty string.

Useful References

• Python Elif
• Python – Substring

# Complete the following function
def extractCreditCardNumber(request):







# Boilerplate code - Do not edit the following
def main():
    request = input()
    print(extractCreditCardNumber(request))

if __name__ == "__main__":
    main()

A12005122214606123456781234F8BCA47852

4606123456781234

B0012005122214616123456781234F8BCA47852

4616123456781234

70012005122214616123456781234F8BCA47852

# Complete the following function
def extractCreditCardNumber(request):
    credit_card_number_length = 16
    if request[0] == 'A':
        return request[11 : 11+credit_card_number_length]
    elif request[0] == 'B':
        return request[13 : 13+credit_card_number_length]
    else:
        return ""

# Boilerplate code - Do not edit the following
def main():
    request = input()
    print(extractCreditCardNumber(request))

if __name__ == "__main__":
    main()