#include <bits/stdc++.h>
using namespace std;
#define rep(i, x, limit) for (long long i = (long long)x; i < (long long)limit; i++)
#define REP(i, x, limit) for (long long i = (long long)x; i <= (long long)limit; i++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define el '\n'
#define spa " "
#define Yes cout << "Yes" << el
#define No cout << "No" << el
#define YES cout << "YES" << el
#define NO cout << "NO" << el
#define eps (1e-10)
#define Equals(a,b) (fabs((a) - (b)) < eps )
#define debug(x) cerr << #x << " = " << x << el
using ll = long long;
using ull = unsigned long long;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
using vi = vector<int>;
using vl = vector<ll>;
using vvl = vector<vector<ll>>;
using vs = vector<string>;
using vb = vector<bool>;
const double pi = 3.141592653589793238;
const int inf = 1073741823;
const ll infl = 1LL << 60;
const string ABC = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const string abc = "abcdefghijklmnopqrstuvwxyz";
const ll MOD = 998244353;
#include<atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using vm = vector<mint>;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  ll h,w,k;cin>>h>>w>>k;
  vs S(h);
  rep(i,0,h)cin>>S[i];
  auto ok=[&](ll a,ll b){
    if(0<=a&&a<h&&0<=b&&b<w)return true;
    return false;
  };
  vl X={1,0},Y={0,1};
  vector<vector<vm>> dp(h,vector<vm>(w,vm(h+w+1,0)));
  dp[0][0][0]=1;
  rep(i,0,h)rep(j,0,w){
    rep(kk,0,2){
      ll nx=i+X[kk],ny=j+Y[kk];
      rep(l,0,h+w){
      if(ok(nx,ny)&&S[nx][ny]!='#'){
        if(S[nx][ny]=='.'){
          dp[nx][ny][l]+=dp[i][j][l];
        }else{
          dp[nx][ny][l+1]+=dp[i][j][l];
        }
      }
    }
    }
  }
  mint ans=0;
  rep(i,0,k){
    ans+=dp[h-1][w-1][i];
  }
  cout<<ans.val()<<el;
}