Untitled

#include <iostream>
#include<algorithm>
#include<vector>
#include<string>
using namespace std;
int main()
{
    int t;
    cin >> t;
    while (t--)
    {
        int n, m, q = 0;
        bool b = false;
        cin >> n >> m;
        vector<vector<char>>a(n, vector<char>(m));
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                cin >> a[i][j];
            }
        }
        for (int j = 0; j < m; j++)
        {
            for (int i = 0; i < n; i++)
            {
                if (a[i][j] == 'v' && q == 0)
                {
                    q++;
                    break;
                }
                if ((a[i][j] == 'i') && (q == 1))
                {
                    q++;
                    break;
                }
                if ((a[i][j] == 'k') && (q == 2))
                {
                    q++;
                    break;
                }
                if ((a[i][j] == 'a') && (q == 3))
                {
                    b = true;
                    break;
                }
            }
        }
        if (b)
        {
            cout << "YES" << endl;
        }
        else
        {
            cout << "NO" << endl;
        }
    }
    return 0;
}