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from collections import Counter
def is_palindrome(x):
return len([count for _, count in Counter(x).items() if count % 2 == 1]) <= 1
xs = [("civic", True),
("ivicc", True),
("civil", False),
("livci", False)]
for x, expected in xs:
result = is_palindrome(x)
print(x)
print(result)
assert result == expected
print("Success!")
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