using System;

using System.Collections.Generic;

​

class Result

{

    public static void commonSubstring(List<string> a, List<string> b)

    {

    }

}

public class Program

{

    static List<string> a = new List<string>();

    static List<string> b = new List<string>();

    public static void Main()

    {

        a.Add("ab");

        a.Add("cd");

        b.Add("ae");

        b.Add("ed");

        foreach(var item in a)

        {

            foreach(var i in item.ToCharArray())

            {

                foreach(var itemb in b)

                {

                    if(itemb.Contains(i.ToString()))

                    {

                        Console.WriteLine(a.IndexOf(item) + " " + item + " " + itemb + " " + i.ToString() + " YES");

                    }

                    else

                    {                       

                        Console.WriteLine(a.IndexOf(item) + " " + item + " " + itemb + " " + i.ToString() + " NO");

                    }

                }

            }

        }

    }

}