#define F_C
#include <bits/stdc++.h>
#define rep(i, l, r) for(int i = l; i < r; i++)
#define hrp(i, l, r) for(int i = l; i <= r; i++)
#define rev(i, r, l) for(int i = r; i >= l; i--)
#define int ll
using namespace std;
typedef long long ll;
template<typename tn = int> tn next(void) { tn k; cin>>k; return k; }
#ifndef LOCAL
#define D(...) 0
#endif
const int p = 1000000007;
ll qpow(ll a,ll b){
	if(b==1) return a;
	ll t=qpow(a,b/2);
	t=t*t%p;
	if(b&1) t=t*a%p;
	return t;
}
ll C(ll n,ll m){
	if(n<m) return 0;
	if(m>n-m) m=n-m;
	ll a=1,b=1;
	for(int i=0;i<m;i++){
		a=(a*(n-i))%p;
		b=(b*(i+1))%p;
	}
	return a*qpow(b,p-2)%p;
}
ll lucas(ll n,ll m){
	if(m==0) return 1;
	return lucas(n/p,m/p)*C(n%p,m%p)%p;
}
signed main(void)
{
    #ifdef LOCAL
//	freopen("C:\\Users\\Loxil\\Desktop\\IN.txt", "r", stdin);
//	freopen("C:\\Users\\Loxil\\Desktop\\OUT.txt", "w", stdout);
    #endif
    
    ios::sync_with_stdio(false);
    cin.tie(0);
    
    int T = next();
    while(T--)
    {
        int n, m;
        cin>>n>>m;
        if (n+m == 2) cout<<1<<endl;
        else if (n == 1 || m == 1) cout<<2<<endl;
        else cout<<4*lucas(n+m-2, n-1)<<endl;
    }
    
    return 0;
}
/*

 */