def ntw(n):
    """Numbers to Words (ntw)
    -------------------------
    Convert integers less than 100 from numeric
    type to spelled-out words, as strings.
    
    Examples
    --------
    >>> ntw(44)
    >>> "XLIV"
    
    Parameters
    ----------
    n : int
        1 <= int(x) <= 99
    
    Returns
    -------
    str
        Roman Numeral equivalent
    """
    numbers_to_words = {
        1: "I",
        2: "II",
        3: "III",
        4: "IV",
        5: "V",
        6: "VI",
        7: "VII",
        8: "VIII",
        9: "IX",
        10: "X",
        20: "XX",
        30: "XXX",
        40: "XL",
        50: "L",
        60: "LX",
        70: "LXX",
        80: "LXXX",
        90: "XC",
        100: "C",
        0: "",
    }
    try:
        return numbers_to_words[n]
    except KeyError:
        try:
            return numbers_to_words[n - n % 10] + numbers_to_words[n % 10]
        except KeyError:
            return "[error:Number out of range]"