#include <bits/stdc++.h>
using namespace std;
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int B, D;
    cin >> B >> D;
    vector<string> shape(D);
    for (int j = 0; j < D; j++) cin >> shape[j];
    int W, H;
    cin >> W >> H;
    vector<string> park(H);
    for (int y = 0; y < H; y++) cin >> park[y];
 
    // 1x1 UFO 전용: 체커보드 패턴 배치
    for (int y = 0; y < H; y++) {
        for (int x = 0; x < W; x++) {
            if (park[y][x] == '.' && ((x + y) % 2 == 0)) {
                park[y][x] = 'O';
            }
        }
    }
 
    for (int y = 0; y < H; y++) cout << park[y] << "\n";
}

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4 3
O..O
OOOO
.O..
20 10
....................
.w......w.......ww..
....ww......w.w.....
.w.....w............
...w......w.........
w................ww.
....w...............
.w.....w........w.ww
............w.......
....w..............w