using System;
 
public class Test
{
	static void Main(string[] args)
	{
		String nick = "123abc321";
 
    	int max = Convert.ToInt32(Math.Pow(2, nick.Length));
    	for(int i = 0; i < max; i++)
    	{
    		String result = "";
        	for (int j = 0; j < nick.Length; j++)
        	{
            	if ((i & Convert.ToInt32(Math.Pow(2, j))) == 0) result += nick[j].ToString().ToLower();
            	else result += nick[j].ToString().ToUpper();
        	}
			Console.Write(result + "\t");
			//if(i%8 == 7) 
			Console.WriteLine();
        }
 
		Console.ReadKey();
	}
}

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