#include<iostream>
#include<algorithm>
#include<string>
#include<cstdio>
#include<stdio.h>
using namespace std;

const int N = 10010;
int cnt[N];
char str[N];

int main()
{
    int n;
    cin >> n;

    int res = 0;
    while(n--)
    {
        int a;
        while(cin >> a) cnt[res++] = a;
    }

    sort(cnt, cnt + res);

    int ans1, ans2;
    for(int i = 1; i < res; i++)
    {
        if(cnt[i] == cnt[i - 1]) ans2 = cnt[i];
        if(cnt[i] == cnt[i - 1] + 2) ans1 = cnt[i] - 1;
    }

    cout << ans1 << " " << ans2 << endl;
    return 0;
}