#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define ALL(v) v.begin(),v.end()
typedef long long ll;
 
#include<bits/stdc++.h>
using namespace std;

const int MOD=998244353;
ll dp[110][110][220];

int main(){
  ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
  
  int h,w,k;
  cin>>h>>w>>k;
  vector<string> S(h);
  rep(i,h) cin>>S[i];
  
  dp[0][0][0]=1;
  rep(i,h) rep(j,w) rep(l,k){
  	if(dp[i][j][l]==0) continue;
  	
  	if(i<h-1 && S[i+1][j]=='#') ;
    else if(i<h-1 && S[i+1][j]=='.') dp[i+1][j][l]=(dp[i+1][j][l]+dp[i][j][l])%MOD;
  	else if(i<h-1)  dp[i+1][j][l+1]=(dp[i+1][j][l+1]+dp[i][j][l])%MOD;
  	
  	if(j<w-1 && S[i][j+1]=='#') ;
  	else if(j<w-1 && S[i][j+1]=='.') dp[i][j+1][l]=(dp[i][j+1][l]+dp[i][j][l])%MOD;
  	else if(j<w-1)  dp[i][j+1][l+1]=(dp[i][j+1][l+1]+dp[i][j][l])%MOD;
  }
  ll ans=0;
  rep(l,k) ans=(ans+dp[h-1][w-1][l])%MOD;
  cout<<ans<<endl;

  return 0;
}