#include<bits/stdc++.h>
using namespace std;
#define ll   long long
#define pb   push_back
#define yes   cout<<"YES"<<endl
#define no   cout<<"NO"<<endl
#define all(x) (x).begin(), (x).end()
#define optimize() ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
ll ans[1005][1005],ar[1005][1005];
ll mod= 1e9+7;

int main()
{
    optimize();
    ll n,m; cin>>n>>m;
    for(ll i=1;i<=n;i++){
        for(ll j=1;j<=m;j++){
            cin>>ar[i][j];
            if(ar[i][j]==0) ans[i][j]=0;
            else if(i==1 && j==1) ans[i][j]=1;
            else if(i==1) ans[i][j]= ar[i][j-1];
            else if(j==1) ans[i][j]= ar[i-1][j];
            else ans[i][j]= (ans[i-1][j]+ans[i][j-1]);
            ans[i][j]%=mod;
        }
    }

    cout<<ans[n][m]<<endl;


    return 0;
}