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# Enter your code here. Read input from STDIN. Print output to STDOUTimportrenumber_of_cards=int(input())for_inrange(number_of_cards):card_number=input()ifnotre.match('[4-6][0-9]{3}-?[0-9]{4}-?[0-9]{4}-?[0-9]{4}$',card_number):print('Invalid')continuecard_number=card_number.replace('-','')ifre.search(r'([0-9])\1{3}',card_number):print('Invalid')continueprint('Valid')
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Validating Credit Card Numbers
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