using System;
using System.Collections.Generic;

public class Program
{
    public static void Main()
    {
        List<int> numbers = new List<int> { 1, 2, 3, 4, 5, 6 };
        List<string> words = new List<string> { "apple", "banana", "cherry" };

        Console.WriteLine("Count of numbers: " + GetListCount(numbers));
        Console.WriteLine("Count of words: " + GetListCount(words));
    }

    public static int GetListCount<T>(List<T> list)
    {
        // Check if the list type is either int or string, else throw exception
        if (typeof(T) != typeof(int) && typeof(T) != typeof(string))
        {
            throw new ArgumentException("List must be of type int or string.");
        }

        return list.Count;
    }
}