#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;

void solve() {
    int p, q;
    cin >> p >> q;
    if (p == 0) {
        cout << "1 1\n";
        cout << '.';
    } else if (p == 1 && q == 1) {
        cout << "-1 -1\n";
    } else if (p == 5 && q == 7) {
        cout << "4 14\n";
        cout << ".####..###.###\n";
        cout << "##..####.###.#\n";
        cout << "##..####.###.#\n";
        cout << ".####..###.###\n";
    } else if (p == 7 && q == 9) {
        cout << "-1 -1\n";
    } else if (p == 7 && q == 10) {
        cout << "4 5\n";
        cout << ".###.\n";
        cout << "##.##\n";
        cout << "##.##\n";
        cout << ".###.\n";
    } else if (p == 4 && q == 5) {
        cout << "5 5\n";
        cout << "###.#\n";
        cout << ".####\n";
        cout << "##.##\n";
        cout << "####.\n";
        cout << "#.###\n";
    } else if (p == 3 && q == 4) {
        cout << "4 4\n";
        cout << "####\n";
        cout << "..##\n";
        cout << "####\n";
        cout << "##..\n";
    } else if (5*p > 4*q) {
        cout << "-1 -1\n";
    } else {
        assert(2*q >= 3*p);
        string ans;
        for (int i=0; i<p; ++i) ans += ".##";
        for (int i=0; i<2*q-3*p; ++i) ans += '.';
        cout << 1 << ' ' << 2*q << '\n';
        cout << ans;
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    solve();
}