#include <iostream>
#include <vector>

#define LIMIT 20000000

int main() {

    int c;

    std::cin >> c;

    std::vector<int> nums;
    std::vector<int> twins;

    int max = 0;
    while (c != 0) {
        int a;

        std::cin >> a;
        if (a > max) {
            max = a;
        }
        nums.push_back(a);

        c--;
    }

    std::vector<bool> sieve(LIMIT + 1, true);
    sieve[0] = sieve[1] = false;

    for (int p = 2; p * p <= LIMIT; ++p) {
        if (sieve[p]) {
            for (int i = p * p; i <= LIMIT; i += p) {
                sieve[i] = false;
            }
        }
    }

    int last = 0;
    int k = 0;
    for (int p = 2; p <= LIMIT; ++p) {
        if (sieve[p]) {
            k++;

            if ((p - last) == 2) {
                for (int n : nums) {
                    if (n == k) {
                        printf("%d %d", p, last);
                    }
                }
            }

            last = p;
        }
    }





}