using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
	static string Rank(int rank)
	{
		switch (rank % 10)
		{
			case 1:
				return rank.ToString() + "st";
				break;
			case 2:
				return rank.ToString() + "nd";
				break;
			case 3:
				return rank.ToString() + "rd";
				break;
			default:
				return rank.ToString() + "th";
				break;
		}
	}

	static void Main(string[] args)
	{
		var HN = Console.ReadLine().Split().Select(int.Parse);
		int H = HN.First(), N = HN.Last();
		var A = new int[N - 1];
		for (int i = 0; i < N - 1; i++)
		{
			A[i] = int.Parse(Console.ReadLine());
		}
		var ordered = A.OrderByDescending(item => item).ToArray();
		for (int i = 0; i < N - 1; i++)
		{
			if (H > ordered[i])
			{
				Console.WriteLine(Rank(i + 1));
				return;
			}
		}
		Console.WriteLine(Rank(N));
	}
}