def rmchars(chars: str, s: str) -> str:
    """Remove chars from s.

    >>> rmchars("123", "123456")
    '456'
    >>> rmchars(">=<.", ">=2.0")
    '20'
    >>> rmchars(">=<.", "")
    ''
    """
    for c in chars:
        s = s.replace(c, "")
    return s