#include <iostream>
#include <vector>
#include <cmath>

int calculate_number(std::vector<int> poses, int len){
    int res = 1;
    for(int i = 0; i < len - 1; i++){
        if(poses[i] < poses[i+1]){
            res = (res << 1) ;
        }else{
            res = (res << 1) + 1;
        }
        //std::cout << res << '\n';
    }
    return res;
}
int main(){
    int n1 = 0, n2 = 0;
    std::cin >> n1;
    
    std::string el;
    std::vector<int> pos1, pos2;
    for(int i = 0; i < n1 ; i++){
        std::cin >> el;
        pos1.push_back(el.find("#"));
    }
    // for(int i = 0; i < n1 ; i++){
    //     std::cout << pos1[i] << "da3123123dasd\n";
    // }
    std::cin >> n2;
    for(int i = 0; i < n2 ; i++){
        std::cin >> el;
        pos2.push_back(el.find("#"));
    }

    // for(int i = 0; i < n2 ; i++){
    //     std::cout << pos2[i] << "dadasd\n";
    // }
    int max_left = 0;
    int current_left = 0;

    int max_right = 0;
    int current_right = 0;
    int num1 = calculate_number(pos1, n1);
    int num2 = calculate_number(pos2, n2);
    int sum = num1+num2;
    
    int sum_tmp = sum;
    int num_rows_result = int(log2(sum)) + 1;
    std::cout << num_rows_result << '\n';
    for(int i = 0; i < num_rows_result - 1; i++){
        if(sum % 2 == 1){
            sum = int((sum - 1) / 2);
            current_left += 1;
            current_right -= 1;
            max_left = std::max(current_left, max_left);
        }else{
            sum = int(sum / 2);
            current_left -= 1;
            current_right += 1;
            max_right = std::max(current_right, max_right);
        }
    }
    sum = sum_tmp;
    //std::cout << sum << ' ' << num_rows_result << ' ' << max_right << ' ' << max_left << '\n';
    int num_cols = max_right + max_left + 1;
    int current_pos = max_left;
    for(int i = 0; i < num_rows_result; i++){
        for(int j = 0; j < num_cols; j++){
            if(j == current_pos){
                std::cout << '#';
            }else{
                std::cout << '.';
            }
        }
        if(sum % 2 == 1){
            current_pos-=1;
            sum = int((sum - 1) / 2);
        }else{
            current_pos+=1;
            sum = int(sum / 2);
        }
        std::cout <<'\n';
    }
    //std::cout << res1 << '\n';
    return 0;
}