#include <bits/stdc++.h>
using namespace std;
using ll = long long;
// #define int ll
// #define endl '\n'
#define F first
#define S second
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define sz(x) (int)(x).size()

ll decode(vector<string> const& a) {
    int n = sz(a)-2;
    int m = sz(a[0])-2;
    int y = 1, x = 0;
    while (a[y][x] == '.') x++;
    ll num = 1;
    while (y < n) {
        if (a[y+1][x+1] == '#') {
            num *= 2;
            x++;
        } else if (a[y+1][x-1] == '#') {
            num *= 2;
            num++;
            x--;
        } else assert(0);
        y++;
    }
    return num;
}

vector<string> load() {
    int n; cin >> n;
    vector<string> a(n+2);
    for (int i = 1; i <= n; i++) {
        string s; cin >> s;
        s = "." + s + ".";
        a[i] = s;
    }
    string border;
    for (int i = 0; i < sz(a[1]); i++) border.push_back('.');
    a[0] = a[n+1] = border;
    return a;
}

vector<string> encode(ll X) {
    int ops = 0;
    int mx_left = 0, mx_right = 0;
    int curr = 0;
    ll num = X;
    while (num != 1) {
        if (num % 2 == 0) {
            curr--;
        }
        else {
            curr++;
        }
        ops++;
        if (curr < 0) {
            mx_left = max(mx_left, abs(curr));
        } else {
            mx_right = max(mx_right, curr);
        }
        num /= 2;
    }
    int n = ops+1;
    int m = 1 + mx_left+mx_right;
    vector<string> res(n+2, string(m+2, '.'));
    int x = 1 + mx_left;
    int y = n;
    res[y][x] = '#';
    while (X != 1) {
        if (X % 2 == 0) {
            x--;
        } else {
            x++;
        }
        y--;
        X /= 2;
        res[y][x] = '#';
    }
    return res;
}

void tc() {
    // for (ll i = 1; i <= 100; i++) {
        // assert(decode(encode(i)) == i);
    // }

    auto a = load();
    // cerr << decode(a) << endl;
    auto b = load();
    // cerr << decode(b) << endl;
    auto e = encode(decode(a) + decode(b));
    int n = sz(e)-2;
    int m = sz(e[0])-2;
    cout << n << endl;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            cout << e[i][j];
        }
        cout << endl;
    }
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    tc();
}