import java.util.Arrays;
import java.util.Scanner;

public class Main {
	
	public static long MOD = 1000000007;
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		final long H = sc.nextLong();
		final int N = sc.nextInt();
		
		long[] lens = new long[N - 1];
		for(int i = 0; i < N - 1; i++){
			lens[i] = -sc.nextLong();
		}
		Arrays.sort(lens);
		
		int part = Arrays.binarySearch(lens, -H);
		assert(part < 0);
		
		part = (-(part + 1)) + 1;
		
		switch(part % 10){
		case 1: System.out.println(part + "st"); break;
		case 2: System.out.println(part + "nd"); break;
		case 3: System.out.println(part + "rd"); break;
		default: System.out.println(part + "th"); break;
		}
	
	}
}