import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[] types = new int[n];
        for(int types_i=0; types_i < n; types_i++){
            types[types_i] = in.nextInt();
        }
        // your code goes here
        int[] count = new int[6];
        for(int i = 0; i<n;i++)
        {
            count[types[i]]++;
        }
        int output = 0;
        int type = -1;
        for(int j = 1; j<6;j++)
        {
            if(count[j]>output)
            {
                output = count[j];
                type = j;
            }
        }
        
        if(type!=-1)
            System.out.print(type);
        else
            System.out.print("No birds");
    }
}