#include <bits/stdc++.h>


int main ()
{
    int N, M;
    std::cin >> N;
    std::string line;
    std::vector<int> arr1;
    for (int i = 0; i < N; ++i)
    {
        std::cin >> line;
        for (int j = 0; j < static_cast<int>(line.size()); ++j)
        {
            if (line[j] == '#')
            {
                arr1.push_back(j);
                break;
            }
        }
    }
    arr1.push_back(-1);

    std::cin >> M;
    std::vector<int> arr2;
     for (int i = 0; i < M; ++i)
    {
        std::cin >> line;
        for (int j = 0; j < static_cast<int>(line.size()); ++j)
        {
            if (line[j] == '#')
            {
                arr2.push_back(j);
                break;
            }
        }
    }
    arr2.push_back(-1);
    int num1 = 1;
    for (int i = 0; i < N; ++i)
    {
        int pos1 = arr1[i];
        int pos2 = arr1[i+1];
        if (pos2 == -1)
            break;
        
        if (pos2 > pos1)
            num1 *= 2;
        else
            num1 = num1*2+1;

    }

    int num2 = 1;
    for (int i = 0; i < M; ++i)
    {
        int pos1 = arr2[i];
        int pos2 = arr2[i+1];
        if (pos2 == -1)
            break;
        
        if (pos2 > pos1)
            num2 *= 2;
        else
            num2 = num2*2+1;

    }
    //std::cout << num1 << ", " << num2 << std::endl;
    int sum = num1 + num2;
    int min = INT_MAX;
    int max = INT_MIN;
    int pos = 0;
    min = std::min(min, pos);
    max = std::max(max, pos);
    std::vector<int> arr;
    arr.push_back(0);
    while (sum > 1)
    {
        if (sum % 2 == 0 || sum / 2  == 1)
        {
            pos -= 1;
            arr.push_back(pos);
            min = std::min(min, pos);
        }
        else    
        {
            pos += 1;
            max = std::max(max, pos);
            arr.push_back(pos);
        }
        sum /= 2;
        //std::cout << "sum:" << sum << std::endl;
    }
    int len = max - min + 1;
    //for (int j = 0; j < len; ++j) std::cout << arr[j] << ", ";

    std::cout << arr.size() << std::endl;
    //std::cout << "Len: " << len << std::endl;
    for (int i = static_cast<int>(arr.size()) - 1; i >= 0; --i)
    {
        for (int j = 0; j < len; ++j)
        {
            if (j != std::abs(arr[i] - min))
                std::cout << ".";
            else
                std::cout << "#";
        }
        std::cout << std::endl;
    }

    return 0;
}