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import re def validate_phone_number(phone_number): pattern = r'^[789]\d{9}$' match = re.match(pattern,phone_number) return bool(match)
num = int(input()) for i in range(num): phone_number = input() if validate_phone_number(phone_number): print("YES") else: print("NO")
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Validating phone numbers
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import re def validate_phone_number(phone_number): pattern = r'^[789]\d{9}$' match = re.match(pattern,phone_number) return bool(match)
num = int(input()) for i in range(num): phone_number = input() if validate_phone_number(phone_number): print("YES") else: print("NO")