using System;
using System.Globalization;
using System.Linq;
using System.Collections.Generic;
public class Test
{
public static void Main()
{
List<string> listA = new List<string>();
listA.Add("a");
listA.Add("b");
listA.Add("c");
listA.Add("d");
List<string> listB = new List<string>();
listB.Add("b");
listB.Add("d");
bool allAinB = !listB.Except(listA).Any();
Console.Write(allAinB);
}
}
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