using System;

public class HelloWorld
{
    public static void Main(string[] args)
    {
        string[,] sigma =
     {
  { "Eriks, Simba, Pingvins" },
  { "Dorbe, Kurpe, Cs" }
     };

        for (int i = 0; i < sigma.GetLength(0); i++)
        {
            Console.WriteLine($"Group {i + 1}");

            for (int j = 0; j < sigma.GetLength(1); j++)
            {
                Console.WriteLine(sigma[i, j]);
      }
        }
   }
}