package Sorting;

import java.util.*;

import java.io.*;

/*

* @author -- rajatgoyal715

*/

public class ClosestNumbers {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

int n = sc.nextInt();

int a[] = new int[n];

for(int i=0;i<n;i++){

a[i] = sc.nextInt();

}

Arrays.sort(a);

String list="";

int min = Integer.MAX_VALUE;

for(int i=0;i<n-1;i++){

int diff = a[i+1] - a[i];

if(diff<min){

list = "";

min = diff;

list=a[i]+" "+a[i+1]+" ";

}

else if(diff==min)

list+=a[i]+" "+a[i+1]+" ";

}

System.out.println(list);

}

}