#include <bits/stdc++.h>
using namespace std;

int main() {
    int H, W;
    cin >> H >> W;
    vector<string> S(H);
    pair<int, int> X = {-1, -1};
    for (int i = 0; i < H; ++i) cin >> S[i];
    for (int i = 0; i < H; ++i) {
    	for (int k = 0; k < W; ++k) {
    		if (S[i][k] == 'w') {
    			if (k - 3 < 0 || S[i][k - 3] != '9') {
    				S[i][k + 2] = 'Y';
    				X = {i, k + 3};
    			} else if (X.first == i && X.second == k - 3) {
    				S[i][k + 2] = 'Y';
    				X = {i, k + 3};
    			} else {
    				S[i][k - 2] = 'Y';
    				X = {i, k - 3};
    			}
    		}
    	}
    }
    for (int i = 0; i < H; ++i) {
    	for (int k = 0; k < W; ++k) cout << S[i][k];
    	cout << endl;
    }
}