#include <cstdio>

#define I_F "backbarn.in"
#define O_F "backbarn.out"

const short MAXn=5+2;
const short R[4][2]={		 { 1, 0},
					 { 0,-1},		 { 0, 1},
					 		 {-1, 0}};

short n,m,k,ans=0;
bool map[MAXn][MAXn]={{false}};

void Input();
void Dfs(const short&, const short&, const short&);
void Output();

int main()
{
	Input();
	Dfs(1,1,1);
	Output();
	return 0;
}

void Input()
{
	freopen(I_F,"r",stdin);
	scanf("%hd%hd%hd",&n,&m,&k);
	char t;
	for (short i=n; i>0; --i)
	{
		scanf("%*c");
		for (short j=1; j<=m; ++j)
		{
			scanf("%c",&t);
			map[i][j]=(t=='.')?true:false;
		}
	}
}

void Dfs(const short &x, const short &y, const short &j)
{
	if (x==n && y==m)
		++ans;
	else
		if (n+m-x-y<=k-j)
		{
			map[x][y]=false;
			for (short i=0; i<4; ++i)
				if (map[x+R[i][0]][y+R[i][1]])
					Dfs(x+R[i][0], y+R[i][1],j+1);
			map[x][y]=true;
		}
}

void Output()
{
	freopen(O_F,"w",stdout);
	printf("%hd\n",ans);
}