using System;

namespace Method
{

    class Program 
    {  
 
// method declaration
        public string fncGetABC(int iNumber)
        {
            if (iNumber < 0)
            {
				Console.WriteLine("{0} is less than 0", iNumber);
				Console.ReadLine();
                                return " ";
            }
            else if (iNumber > 26)
            {
				Console.WriteLine("{0} is greater than 26", iNumber);
				Console.ReadLine();
                                return " ";
            }
            else
            {
                string sAlpha = "Z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z";
                string[] aAlpha = sAlpha.Split(' ');
		Console.WriteLine("{0} is greater than 26", iNumber);
		Console.WriteLine(sAlpha);
		Console.ReadLine();
                return aAlpha[iNumber];
            }
        }

	public static void Main(string[] args) 
        {
            // create class object 
            Program p1 = new Program();

            //call method 
            Console.WriteLine("14");
            Console.WriteLine(p1.GetExcelColumnName(16384));
            Console.ReadLine();
        }

	private string GetExcelColumnName(int columnNumber)
	{
	    string columnName = "";

	    while (columnNumber > 0)
	    {
        	int modulo = (columnNumber - 1) % 26;
	        columnName = Convert.ToChar('A' + modulo) + columnName;
        	columnNumber = (columnNumber - modulo) / 26;
	    } 

	    return columnName;
	}
    }
}