using System; 

class GFG 

{ 

static int MAX = 26; 

// Returns a String of random alphabets of 

// length n. 

static String printRandomString(int n) 

{ 

    char []alphabet = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 

                        'H', 'I', 'J', 'K', 'L', 'M', 'N',  

                        'O', 'P', 'Q', 'R', 'S', 'T', 'U', 

                        'V','Y', 'Z' }; 

    Random random = new Random(); 

    String res = ""; 

    for (int i = 0; i < n; i++)  

        res = res + alphabet[(int)(random.Next(0, MAX))]; 

    return res; 

} 

// Driver code 

public static void Main() 

{ 

    int n = 5; 

    Console.Write("AG4" +printRandomString(n)); 

} 

}