using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var ss = new string[10];

        for (int i = 0 ; i < 10; i++)

        {

            ss[i] = F(() => i) + "\t";

        }

        for (int i = 0 ; i < 10; i++)

        {

            string s = F(() => i);

            ss[i] += s;

        }

        foreach (var s in ss)

            Console.WriteLine(s);

    }

    static string F(Func<int> fi) => fi().ToString();

}