import re


def normalize_name(s: str) -> str:
    """Strong normalization for podcast names as they seem to have slight
    variations in the Webtrekk data. Lowers string and removes all characters
    except alphanumerics.

    Args:
        s (str): The string to normalize

    Returns:
        str: The normalized string
    """
    s = s.lower()
    s = "".join(re.findall(r"[\d\w]", s))

    return s