using System;
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Linq.Expressions;
using System.Net;
using System.Text;
using System.Configuration;
using System.Text.RegularExpressions;
 
namespace ProgramConsole
{
    public class Program
    {
        public static void Main(string[] args)
        {
            string s = "helloHellohi";
            string[] array = new string[] { "hello", "Hello", "hi", "Hi", "hey", "Hey", "Hay", "hey" };
 
            foreach (var item in array)
            {
                if(s.Contains(item))
                    Console.WriteLine(item);
            }
        }
    }
}

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