using System;
using System.Text;
public class Program
{
public static void Main()
Console.WriteLine(JoinString());
}
public static string JoinString()
string data = "Hello-";
StringBuilder sb = new StringBuilder(data);
for(int i = 1; i <= 10; i++)
sb.Append((i*100).ToString());
sb.Append(",");
return sb.ToString().Substring(0,sb.Length-1);