Credit Card Validifier

Description:

Make a program that sees if a credit card number is valid or not. Also the program should tell you what type of credit card it is if it is valid.

The five things you should consider in your program is: AMEX, Discover, VISA, Master, and Invalid :

Discover starts with 6011 and has 16 digits,
AMEX starts with 34 or 37 and has 15 digits,
Master Card starts with 51-55 and has 16 digits,
VISA starts with 4 and has 13 or 16 digits.

Examples

Ex: Input: 6011364837263748 --> Output: "Discover"
Ex: Input: 5318273647283745 --> Output: "MasterCard"
Ex: Input: 12345678910 --> Output: "Invalid"
Ex: Input: 371236473823676 --> Output: "AMEX"
Ex: Input: 4128374839283 --> Output: "VISA"

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Stats:

Created	Aug 5, 2015
Warriors Trained	430
Total Skips	41
Total Code Submissions	693
Total Times Completed	253
Python Completions	253
Total Stars	5

% of votes with a positive feedback rating	87% of 84
Total "Very Satisfied" Votes	69
Total "Somewhat Satisfied" Votes	8
Total "Not Satisfied" Votes	6
Total Rank Assessments	99
Average Assessed Rank	6 kyu
Highest Assessed Rank	1 kyu
Lowest Assessed Rank	8 kyu

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