#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define endl '\n'
const int mod = 1e9 + 7;
ll n,m;
vector<char>a[1000006];
int fa[1000005];
// 初始化
void init(int n)
{
    for (int i = 1; i <= n; i++)
        fa[i] = i;
}

// 找父节点，路径压缩
int find(int i)
{
    if (fa[i] == i)
        return i;
    else
    {
        fa[i] = find(fa[i]); // 路径压缩
        return fa[i];
    }
}
// 合并
void bing(int i, int j)
{
    int i_fa = find(i);
    int j_fa = find(j);
    fa[i_fa] = j_fa;
}
ll quickp(ll a,ll b){
    ll ans = 1;
    while(b > 0){
        if(b&1){
            ans = ans * a %mod;
        }
        b >>= 1;
        a = a*a%mod;
    }
    return ans%mod;
}
struct edgeto{
    ll a,b;
};
vector <edgeto> g[1000005];
vector <ll> color;
ll flag = 1;
void dfs(ll x,ll c){
    color[x] = c;
    for(auto to : g[x]){
        if(color[to.a] == -1&&to.b == 2) 
        //如果未涂色 边是2 涂相反颜色
            dfs(to.a,c^1);
        else if(color[to.a] == -1&&to.b == 1){  
        //如果未涂色 边是1 涂相同颜色
            dfs(to.a,c);
        }
        else{
            //已经有颜色
            if(color[to.a] == c&&to.b == 2){
            //边是2，并且是相同颜色，说明无法二分图
                flag = 0;
                return ;
            }
            if(color[to.a] == (c^1)&&to.b == 1){
            //边是1，并且是相反 颜色，说明无法二分图
                flag = 0;
                return ;
            }
        }
    }
}

void solve()
{
    cin >> n >> m;
    init(n);
    for(int i = 1;i <= n;i++){
        a[i].clear();
        g[i].clear();
        // a[i].push_back(0);
        for(int j = 1;j <= m;j++){
            char x;cin >> x;
            a[i].push_back(x);
        }
    }   
    // cout << a[1][2] << "?";

    for(int j = 0;j <= (m-1)/2;j++){
        ll cnt1 = 0,flg=0;
        ll x,y;
        for(int i = 1;i <= n;i++){
            if(a[i][j] == '1'){
                cnt1++;
                if(cnt1 == 1)x = i;
                if(cnt1 == 2)y = i;
                if(cnt1 > 2){
                    cout << "0\n";
                    return ;
                }
            }
        }
        if(cnt1 == 2){
            flg = 1;
            edgeto xx;
            xx.a = y;
            xx.b = 2;
            g[x].push_back(xx);
            xx.a = x;
            g[y].push_back(xx);
        }
        for(int i = 1;i <= n;i++){
            if(a[i][m-j-1] == '1'){
                cnt1++;
                if(cnt1 == 1)x = i;
                if(cnt1 == 2)y = i;
                if(cnt1 > 2){
                    cout << "0\n";
                    return ;
                }
            }
        }
        if(cnt1 == 2){
            if(flg == 0){
                // if(x==y)
                edgeto xx;
                xx.a = y;
                xx.b = 1;
                g[x].push_back(xx);
                xx.a = x;
                g[y].push_back(xx);
            }
            bing(x,y);
        }
    }
    ll cnt2=0;

    color = vector<ll>(n+1,-1); //初始化为-1表示都没涂色
    for(int i = 1;i <= n;i++){
        if(fa[i] == i){
            dfs(i,1);       //用涂色法遍历整个图
        }
    }
    

    if(flag == 0){
        cout << "0\n";
        return;
    }else{
        // cout << "YES\n";
    }

    for(int i = 1;i <= n;i++){
        if(fa[i] == i){
            cnt2++;
        }
    }

    
    
    cout << quickp(2,cnt2) << "\n";
   
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t = 1;
    cin >> t;
    while (t--) {
        solve();
    }
    return 0;
}