'''
Implement a function to check if a linked list is a palindrome.

Hints: 5, 13, 29, 61, 101
'''


def palindrome(s):
    ''' '''
    pass

if __name__ == '__main__':
    assert palindrome('') ==
    assert palindrome('') ==
    assert palindrome('') ==
    assert palindrome('') ==
    assert palindrome('') ==
