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

#define int long long
const int M = 998244353;

signed main() {
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n; cin >> n;
	vector<string> s(n);
	for (int i = 0; i < n; i++) {
		cin >> s[i];
	}

	int ans = 1;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			if (s[i][j] == '?') {
				int l = j, r = j;
				while (r < n && s[i][r] == '?') {
					r++;
				}
				r--;

				int bd = 2;
				if (l > 0 && s[i][l-1] == '#') bd--; 
				if (r+1 < n && s[i][r+1] == '#') bd--;
				
				if (bd == 2) {
					ans = (ans*(r-l+2)) % M;
				} else {
					ans = (ans*bd) % M;
				}

				j = r;
			}
		}
	}

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			if (s[j][i] == '?') {
				int l = j, r = j;
				while (r < n && s[r][i] == '?') {
					r++;
				}
				r--;

				int bd = 2;
				if (l > 0 && s[l-1][i] == '#') bd--; 
				if (r+1 < n && s[r+1][i] == '#') bd--;
				
				if (bd == 2) {
					ans = (ans*(r-l+2)) % M;
				} else {
					ans = (ans*bd) % M;
				}

				j = r;
			}
		}
	}
	cout << ans << '\n';

	return 0;
}