def contains_letter_number(text):
    """
    A function which checks whether a String contains at least one letter and number
    Args:
        text (string): A string
    Returns:
    bool: A boolean indicating whether the text provided contains at least one letter and number
    """
    # https://stackoverflow.com/questions/64862663/how-to-check-if-a-string-is-strictly-contains-both-letters-and-numbers
    return text.isalnum() and not text.isalpha() and not text.isdigit()