import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.Scanner;
public class Main{
	public static void main(String[] arg) 
	{
		Scanner sc = new Scanner(System.in);
		int total = sc.nextInt();
		String[] inputs=new String[total];
		for(int i = 0;i<total;i++){
			inputs[i]=sc.next();
		}
		System.out.println(getStable(inputs));
          sc.close();
    }
      public static String getStable(String[] ary){
			string[] temp;
			int[][] nums=new int[ary.length][3];
			for(int i=0;i<ary.length;i++){
				temp = ary[i].split("\\.");
				for(int j=0;j<temp.length;j++){
					nums[i][j]=Integer.valueof(temp[j]);
				}
			}
			int maxMajor=0;int location=0;
			for(int i=0;i<ary.length;i++){
				if(nums[i][0]>maxMajor && nums[i][1]%2==0){
					maxMajor=nums[i][0];
					location=i;
				}
			}
			if(maxMajor==0){
				return "no stable available";
			}
			return ary[location];
		}
	}