#include <iostream>
#include <vector>
using namespace std;

#define ll long long

ll get() {
	int n; scanf(" %d ", &n);
	ll num1 = 1, last = -1;
	string s;
	for (int i=0; i<n; i++) {
		int pos = -1;
		cin >> s;
		for (int i=0; i<s.size(); i++) {
			if (s[i] == '#') {
				pos = i;
				break;
			}
		}
		if (last != -1) {
			if (pos > last) {
				num1 *= 2;
			} else {
				num1 = num1 * 2 + 1;
			}
		}
		last = pos;
	}
	return num1;
}

int main() {
	ll n1 = get();
	ll n2 = get();
	ll num = n1 + n2;
	// printf("%d %d\n", n1, n2);
	vector<int> poss;
	int next = 0, min_val = 0, max_val = 0;
	poss.push_back(0);
	for (; num != 1; num/=2) {
		if (num & 1) {
			next++;
		} else {
			next--;
		}
		poss.push_back(next);
		min_val = min(min_val, next);
		max_val = max(max_val, next);
	}
	printf("%d\n", poss.size());
	for (int i=poss.size()-1; i>=0; i--) {
		int pos = poss[i];
		for (int i=min_val; i<=max_val; i++) {
			if (i == pos)
				printf("#");
			else 
				printf(".");
		}
		printf("\n");
	}
}