#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
using namespace std;
using ll = long long;
constexpr ll MOD = 998244353;

int main(){
    int h, w, k; cin >> h >> w >> k;
    vector<string> s(h);
    for(auto &it: s) cin >> it;

    vector<vector<vector<ll>>> dp(h, vector<vector<ll>>(w, vector<ll>(k+2, 0)));
    dp[0][0][k] = 1;
    for(int i = 0; i < h; i++){
        for(int j = 0; j < w; j++){
            if(s[i][j] == '#') continue;
            for(int l = 0; l <= k; l++){
                if(i-1 >= 0 && s[i-1][j] != '#'){
                    dp[i][j][l] += dp[i-1][j][l+(s[i-1][j] == '.' ? 0 : 1)];
                    dp[i][j][l] %= MOD;
                }
                if(j-1 >= 0 && s[i][j-1] != '#'){
                    dp[i][j][l] += dp[i][j-1][l+(s[i][j-1] == '.' ? 0 : 1)];
                    dp[i][j][l] %= MOD;
                }
            }
        }
    }

    ll ans = 0;
    for(int i = 1; i <= k; i++){
        ans += dp[h-1][w-1][i];
        ans %= MOD;
    }
    cout << ans << endl;
    return 0;
}