var GET=(function(){function f(s){return new g(s);}function g(s){this._s=s.trim().split("\n");this._y=0;}g.prototype.a=function(f){var s=this._s, y=this._y, r;if(typeof s[y]==="string")s[y]=s[y].split(" ").reverse();r=s[y].pop();if(!s[y].length)this._y++;return f?r:+r;};g.prototype.l=function(f){var s=this._s[this._y++].split(" ");return f?s:s.map(a=>+a);};g.prototype.m=function(n,f){var r=this._s.slice(this._y,this._y+=n).map(a=>a.split(" "));return f?r:r.map(a=>a.map(a=>+a));};g.prototype.r=function(n,f){var r=this._s.slice(this._y,this._y+=n);return f?r:r.map(a=>+a);};return f;})();
var o=GET(require("fs").readFileSync("/dev/stdin","utf8"));
var mod = 1e9+7;

console.log(main());
function main(){
  var h = o.a();
  var w = o.a();
  var a = o.r(h,1);
  var dp = Array(h).fill(0).map(a=>Array(w).fill(0));
  dp[0][0] = 1;
  for(var i = 0; i < h; i++){
    if(a[i][0] === "." && i)dp[i][0] = dp[i-1][0];
    for(var j = 1; j < w; j++){
      if(a[i][j] === "#")continue;
      if(i === 0)dp[0][j] = dp[0][j-1];
      else dp[i][j] = (dp[i-1][j] + dp[i][j-1]) % mod;
    }
  }
  return dp[h-1][w-1];
}