/* -*- coding: utf-8 -*-
 *
 * 2430.cc:  No.2430 Damage Zone - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

const int MAX_H = 100;
const int MAX_W = 100;
const int MAX_K = MAX_H + MAX_W;
const int MOD = 998244353;

/* typedef */

/* global variables */

char fs[MAX_H][MAX_W + 4];
int dp[MAX_H][MAX_W][MAX_K];

/* subroutines */

inline void addmod(int &a, int b) { a = (a + b) % MOD; }

/* main */

int main() {
  int h, w, k;
  scanf("%d%d%d", &h, &w, &k);
  for (int i = 0; i < h; i++) scanf("%s", fs[i]);

  dp[0][0][0] = 1;
  for (int i = 0; i < h; i++)
    for (int j = 0; j < w; j++)
      if (fs[i][j] != '#') {
	if (i + 1 < h && fs[i + 1][j] != '#') {
	  if (fs[i + 1][j] == '.')
	    for (int l = 0; l < k; l++)
	      addmod(dp[i + 1][j][l], dp[i][j][l]);
	  else
	    for (int l = 0; l + 1 < k; l++)
	      addmod(dp[i + 1][j][l + 1], dp[i][j][l]);
	}
	if (j + 1 < w && fs[i][j + 1] != '#') {
	  if (fs[i][j + 1] == '.')
	    for (int l = 0; l < k; l++)
	      addmod(dp[i][j + 1][l], dp[i][j][l]);
	  else
	    for (int l = 0; l + 1 < k; l++)
	      addmod(dp[i][j + 1][l + 1], dp[i][j][l]);
	}
      }

  int sum = 0;
  for (int l = 0; l < k; l++)
    addmod(sum, dp[h - 1][w - 1][l]);

  printf("%d\n", sum);
  return 0;
}