#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
using namespace std;


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

    int niza[n];
    for(int i = 0; i < n; i++) {
        cin >> niza[i];
    }
    sort(niza, niza + n);
    int najmal_broj_na_deliteli = 2000000000;
    vector<pair<int, int> > v;
    do {
        int number = 0;
        for(int i = 0; i < n; i++) {
            number = (number * 10) + niza[i];
        }
        int deliteli = 0;
        for(int i = 1; i <= sqrt(number); i++) {
            if(number % i == 0) {
                deliteli++;

                if(i != number / i) {
                    deliteli++;
                }
            }
        }

        if(deliteli < najmal_broj_na_deliteli) {
            najmal_broj_na_deliteli = deliteli;
        }
        v.push_back(make_pair(number, deliteli));


    } while(next_permutation(niza, niza + n));


    cout << najmal_broj_na_deliteli << endl;

    for(int i = 0; i < v.size(); i++) {
        if(v[i].second == najmal_broj_na_deliteli) {
            cout << v[i].first << " ";
        }
    }

    return 0;
}