string String.TwoDigitWords(int num)
{
	double_words = {"Twenty","Thirty","Forty","Fifty","Sixty","Seventy","Eighty","Ninety"};
	teen_words = {"Ten","Eleven","Twelve","Thirteen","Fourteen","Fifteen","Sixteen","Seventeen","Eighteen","Nineteen"};
	single_words = {"One","Two","Three","Four","Five","Six","Seven","Eight","Nine"};
	//num = 99;
	amount_in_words = "";
	if(num > 0)
	{
		if(num < 10)
		{
			amount_in_words = single_words.get(num - 1);
		}
		else if(num < 20)
		{
			amount_in_words = teen_words.get(num - 10);
		}
		else if(num < 100)
		{
			first_digit_str = num.toString().substring(0,1);
			first_digit = first_digit_str.toLong();
			if(num % 10 == 0)
			{
				amount_in_words = double_words.get(first_digit - 2);
			}
			else
			{
				second_digit_str = num.toString().substring(1);
				second_digit = second_digit_str.toLong();
				amount_in_words = double_words.get(first_digit - 2) + " " + single_words.get(second_digit - 1);
			}
		}
	}
	return amount_in_words;
}