#include <bits/stdc++.h>
#define ll long long
#define pb push_back

using namespace std;

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

    int p, q;
    cin >> p >> q;

    if(3*p <= 2*q)
    {
        cout << "1 " << 2*q << "\n";

        for(int i=0; i<p; i++) cout << "##.";
        for(int i=3*p; i<2*q; i++) cout << ".";
        cout << "\n";
    }
    else if(5*p > 4*q)
    {
        cout << "-1 -1\n";
    }
    else if(p == 3 && q == 4)
    {
        cout << "8 8\n";
        cout << "##.##.##\n";
        cout << ".######.\n";
        cout << "###..###\n";
        cout << "#.####.#\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==7 && q==10)
    {
        cout << "4 5\n";
        cout << "##.##\n";
        cout << ".###.\n";
        cout << ".###.\n";
        cout << "##.##\n";
    }
    else if(p==7 && q==9)
    {
        cout << "18 6\n";
        vector<string> s = {"#.####", "###..#", ".#####"};
        for(int i=0; i<6; i++)
        {
            cout << s[0] << "\n" << s[1] << "\n" << s[2] << "\n";
            s[0] = s[0][5] + s[0].substr(0, 5);
            s[1] = s[1][5] + s[1].substr(0, 5);
            s[2] = s[2][5] + s[2].substr(0, 5);
        }
    }
    else if(p==5 && q==7)
    {
        cout << "42 14\n";
        vector<string> s = {"#.############", "###..........#", ".#############"};
        for(int i=0; i<14; i++)
        {
            cout << s[0] << "\n" << s[1] << "\n" << s[2] << "\n";
            s[0] = s[0][13] + s[0].substr(0, 13);
            s[1] = s[1][13] + s[1].substr(0, 13);
            s[2] = s[2][13] + s[2].substr(0, 13);
        }
    }
}