#include<bits/stdc++.h>
#define int long long
#define pii pair<int, int>
#define ll long long
using namespace std;
const int maxn = 3e5 + 10;
int sum[maxn];
void solve() {
    int n, k;
    cin >> n >> k;
    string str;
    cin >> str;
    if (n < 7) {
        cout << 0 << "\n";
        return;
    }
    for (int i = 0; i < min(n, k); i++)
        str.push_back(str[i]);
    for (int i = 0; i < str.length(); i++) {
        if (str.substr(i, 7) == "nanjing")
            sum[i + 1] = 1;
        else
            sum[i + 1] = 0;
    }
    for (int i = 1; i <= str.length(); i++)
        sum[i] += sum[i - 1];
    int ans = 0;
    for (int i = n - 7 + 1; i <= str.length(); i++)
        ans = max(ans, sum[i] - sum[i - (n - 7) - 1]);
    cout << ans << "\n";
}
signed main() {
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int t = 1;
    cin >> t;
    while (t--)
        solve();
    return 0;
}