//Write a program, that reads from the console an array of N integers and an integer K, sorts the array and using the method Array.BinSearch() finds the largest number
//in the array which is ≤ K.
using System;
using System.Collections.Generic;

class LargestNumberK
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        int k = int.Parse(Console.ReadLine());

        int[] arr = new int[n];

        string inputArrayOne = Console.ReadLine();
        string[] inputArrayTwo = inputArrayOne.Split(' ');

        for (int i = 0; i < arr.Length; i++)
        {
            arr[i] = int.Parse(inputArrayTwo[i]);
        }

        Array.Sort(arr);
        Array.BinarySearch(arr,k);

        int elementIndex = Array.BinarySearch(arr, k);

        if (arr[0] > k)
        {
            Console.WriteLine("There isn't such a number!!!");
        }
        else
        {
            if (elementIndex < 0)
            {
                elementIndex = ~(elementIndex) - 1;
                Console.WriteLine(arr[elementIndex]);
            }
            else
            {
                Console.WriteLine(arr[elementIndex]);
            }
        }
    }
}