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integerRoman = {1000: "M", 900: "CM", 500: "D", 400: "CD", 100: "C", 90: "XC", \
                50: "L", 40: "XL", 10: "X", 9: "IX", 5: "V", 4: "IV", 1: "I"}

def integer_to_roman(data):
    """
	 Input: A number as an integer.

	 Output: The Roman numeral as a string.

	 Precondition: 0 < number < 4000 
	"""
	steps = integerRoman.keys()
	steps.sort()
	steps.reverse()

	return int_to_roman(data, steps)

def int_to_roman(num, steps):
	if num == 0:
		return ""

	return (num / steps[0]) * integerRoman[steps[0]] + int_to_roman(num % steps[0], steps[1:])