import string


def letters(text):
    """Remove all non-alphabetic characters from a text
    >>> letters('The Quick')
    'TheQuick'
    >>> letters('The Quick BROWN fox jumped! over... the (9lazy) DOG')
    'TheQuickBROWNfoxjumpedoverthelazyDOG'
    """
    return ''.join([c for c in text if c in string.ascii_letters])