#include <bits/stdc++.h>

using namespace std;
using ll = int64_t;
using ull = uint64_t;

ll get_number() {
	int N;
	cin >> N;
	string line;
	cin >> line;
	int prev_index = line.find("#");
	ll num = 1;

	for (int i = 1; i < N; ++i) {
		cin >> line;
		int index = line.find("#");
		if (index < prev_index) num = num*2 + 1;
		else num = num*2;

		prev_index = index;
	}

	return num;
}


void print(ll num) {
	vector<int> indices = {0};
	int min_i = 0, max_i = 0;

	while (num > 1) {
		int new_i = indices.back();
		if (num % 2 == 0) new_i -= 1;
		if (num % 2 == 1) new_i += 1;
		num >>= 1;

		min_i = min(min_i, new_i);
		max_i = max(max_i, new_i);

		indices.push_back(new_i);
	}

	cout << indices.size() << "\n";
	for (int i = indices.size()-1; i >= 0; --i) {
		string outs(max_i - min_i + 1, '.');
		outs[indices[i] - min_i] = '#';

		cout << outs << "\n";
	}
}


int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	// cout << setprecision(20);
	
	ll a = get_number();
	ll b = get_number();
	print(a + b);


	return 0;
}