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import re

def validPhones(n, a):
    pattern = r'^\d{3}[-.]\d{3}[-.]\d{4}$'
    for num in a:
        if re.match(pattern, num):
            print(num, end=" ")

n = int(input())
a = [input().strip() for _ in range(n)]

validPhones(n, a)

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