def roman( self ):
	romanNum = []
	symbols = ( ( 'M', 1000 ), ( 'C', 100 ), ( 'XC', 90 ), ( 'L', 50 ), ( 'X', 10 ),
		( 'IX', 9 ), ('V', 5 ) , ( 'IV', 4 ), ( 'I', 1 ) )

	for symbol, value in symbols:
		while self >= value:
			self -= value
			romanNum.append( symbol )

	return ''.join( romanNum )

assert roman( 11 ) == "XI", "11 should return XI"
assert roman( 60 ) == "LX", "60 should return LX"
assert roman( 78 ) == "LXXVIII", "78 should return LXXVIII"
assert roman( 4 ) == "IV", "4 should return IV"
assert roman( 99 ) == "XCIX", "99 should return XCIX"

# Add your own assert tests below