#include <bits/stdc++.h>

using namespace std;
#include <atcoder/modint>
using namespace atcoder;
using mint = modint998244353;
void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int main() {
    fast_io();
    int h, w, k;
    cin >> h >> w >> k;
    vector<string> s(h);
    for (int i = 0; i < h; i++) {
        cin >> s[i];
    }
    vector dp(h, vector(w, vector<mint>(k, 0)));
    dp[0][0][0] = 1;
    for (int i = 0; i < h; i++) {
        for (int j = 0; j < w; j++) {
            for (int l = 0; l < k; l++) {
                if (j < w - 1 && s[i][j + 1] != '#') {
                    if (s[i][j + 1] == '.') {
                        dp[i][j + 1][l] += dp[i][j][l];
                    } else if (l < k - 1) {
                        dp[i][j + 1][l + 1] += dp[i][j][l];
                    }
                }
                if (i < h - 1 && s[i + 1][j] != '#') {
                    if (s[i + 1][j] == '.') {
                        dp[i + 1][j][l] += dp[i][j][l];
                    } else if (l < k - 1) {
                        dp[i + 1][j][l + 1] += dp[i][j][l];
                    }
                }
            }
        }
    }
    mint ans = 0;
    for (int i = 0; i < k; i++) {
        ans += dp[h - 1][w - 1][i];
    }
    cout << ans.val() << endl;
}