#include<bits/stdc++.h>

#define int long long

using namespace std;

const int MOD = 1e9 + 7;

int32_t main()

{

int n, m; cin >> n >> m;

char grid[n+1][m+1];

int dp[n+1][m+1];

memset(dp, 0, sizeof(dp));

for(int i = 1; i <= n; i++)

{

for(int j = 1; j <= m; j++)

{

cin >> grid[i][j];

}

}

dp[0][1] = 1;

for(int i = 1; i <= n; i++)

{

for(int j = 1; j <= m; j++)

{

if(grid[i][j] == '#') dp[i][j] = 0;

else dp[i][j] = dp[i - 1][j] + dp[i][j - 1];

dp[i][j] %= MOD;

}

}

cout << dp[n][m] << "\n";

}