#include <iostream>
#include <random>
#include <bits/stdc++.h>
using namespace std;
using ull = __int128;
using ll = long long;
#define rep(i,a,b) for(int i=a;i<b;i++)
#include <iostream>
using namespace std;

const int MAX = 2000010;
const int MOD = 1000000007;

long long fac[MAX], finv[MAX], inv[MAX];

// テーブルを作る前処理
void COMinit() {
    fac[0] = fac[1] = 1;
    finv[0] = finv[1] = 1;
    inv[1] = 1;
    for (int i = 2; i < MAX; i++){
        fac[i] = fac[i - 1] * i % MOD;
        inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD;
        finv[i] = finv[i - 1] * inv[i] % MOD;
    }
}

// 二項係数計算
long long COM(int n, int k){
    if (n < k) return 0;
    if (n < 0 || k < 0) return 0;
    return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD;
}

int main() {
    // 前処理
    COMinit();
ll a,b;
  cin>>a>>b;
  
  vector<vector<ll>> o(a, vector<ll>(b));
 
  for (int i = 0; i < a; i++) {
    for (int j = 0; j < b; j++) {
      cin >> o.at(i).at(j);
    }
  }
 ll ans=1;
  for(int i=0;i<b;i++){
    ans=(ans+COM(o.at(0).at(i)+i,i+1))%1000000007;
  }
  for(int j=0;j<a;j++){
    ans=(ans+COM(o.at(j).at(0)+j,j+1))%1000000007;
  }
  for(int i=0;i<a;i++){
    for(int j=0;j<b;j++){
      ans=(ans+(((COM(o.at(i).at(j)+i+j+1,o.at(i).at(j)-1)%1000000007)*(COM(i+j+2,i+1)%1000000007))%1000000007)%1000000007)%1000000007;
    }
  }
  cout<<ans<<endl;
}