using System;

using System.Collections.Generic;

using System.Linq;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        var a = new List<string>() { "QHIDETH_1" };

        var b = new List<string>() { "QHIDETH" };

        var res = b.Where(x => a.Contains(x));

        var res2 = a.Where(x => b.Contains(x));

        Console.WriteLine(res.Count() + " " +res2.Count()+ " " + "QHIDETH_1".Contains("QHIDETH") );

    }

}