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#include<iostream>
using namespace std;
int main() {int n;int s[100000] = { 0 };int t;int duan;int chong;while (cin >> t) s[t]++;for (int i = 1; i < 100000; i++) {if (s[i - 1] && s[i + 1]) {if (!s[i]) {duan = i;}}if (s[i] > 1)chong = i;if (chong && duan)break;}cout << duan << " " << chong << endl;return 0;
}