using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        string input = "Tennessee";

        char message = 'e';

        List<int> indexes = Testing2(input, message);

        foreach (int item in indexes) {

        Console.WriteLine(item);

        }   

    }

    public static List<int> Testing2(string input, char message)

    {

        List<int> result = new List<int>(); 

        for (int i = 0; i < input.Length; i++){

            if (message == input[i])

            {

                result.Add(i);

            }

        }

        return result;

    }

}