B

#include <bits/stdc++.h>
using namespace std;

int main() {
    int t;
    cin>>t;
    while(t--)
    {
        int n, k; cin >> n >> k;

        vector <int> chk(k, 0);
        for (int i = 0; i < n; i++){
            string str; cin >> str;

            int cnt = 0;
            for (auto x : str) cnt += x == '1';

            if (cnt == 1){
                int x = -1;
                for (int j = 0; j < k; j++) if (str[j] == '1') x = j;

                chk[x] = true;
            }
        }

    int f = 1;

        for (auto x : chk) if (!x){
            cout << "No\n";
        f = 0;
            break;
        }

    if(f)
        cout << "Yes\n";
    }
}