#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using ll = long long;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using VD = vector<double>;
using VVD = vector<VD>;
using VS = vector<string>;
using P = pair<ll,ll>;
using VP = vector<P>;
#define rep(i, n) for (ll i = 0; i < ll(n); i++)
#define out(x) cout << x << endl
#define dout(x) cout << fixed << setprecision(10) << x << endl
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
#define sz(x) (int)(x.size())
#define re0 return 0
#define pcnt __builtin_popcountll
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
constexpr int inf = 1e9;
constexpr ll INF = 1e18;
//using mint = modint1000000007;
using mint = modint998244353;
int di[4] = {1,0,-1,0};
int dj[4] = {0,1,0,-1};

mint dp[101][101][101];

int main(){
    int h,w,K;
    cin >> h >> w >> K;
    VS s(h);
    rep(i,h) cin >> s[i];
    rep(i,h)rep(j,w)rep(k,K) dp[i][j][k] = 0;
    dp[0][0][0] = 1;
    rep(i,h)rep(j,w)rep(k,K){
        rep(v,2){
            int ni = i+di[v];
            int nj = j+dj[v];
            if(ni < 0 || nj < 0 || ni >= h || nj >= w) continue;
            if(s[ni][nj] == '#') continue;
            if(s[ni][nj] == 'o' && k+1 < K){
                dp[ni][nj][k+1] += dp[i][j][k];
            }
            if(s[ni][nj] == '.'){
                dp[ni][nj][k] += dp[i][j][k];
            }
        }
    }
    mint ans = 0;
    rep(k,K) ans += dp[h-1][w-1][k];
    out(ans.val());
}