using System;
public class Program
{
public static void Main()
char[] str = new char[10] {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J'};
for (int i = 0; i <= 4; i++)
Console.Write(str[i]);
Console.WriteLine(str[i + 5]);
}
