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

#define dbg(x...) \
do { \
std::cout << #x << " -> "; \
err(x); \
} while (0)

void err() {
	std::cout << std::endl;
}

template<class T, class... Ts>
void err(T arg, Ts &... args) {
	std::cout << fixed << setprecision(10) << arg << ' ';
	err(args...);
}

void GENSHEN_START() {
	string str = "nanjing";
	int n,k;cin >> n >> k;
	string s;cin >> s;
	int len = s.size();
	int ans = 0;
	k = min(k,n);
	for (int i = 0;i < len;i++) {
		if (i + 6 < len) {
			string now = s.substr(i,7);	
			if (now == str) {
				ans++;
				for (int j = 1;j <= 7;j++) s.erase(s.begin());
				i = i - 1;
				len = s.size();
				break;
			}
			else {
				if (k) {
					char x = *(s.begin());
					s.erase(s.begin());	
					s.push_back(x);
					i = i - 1;
					k--;
				}
				else break;
			}
		}
	}
	for (int i = 0;i < len;i++) {
		if (i + 6 < len) {
			string now = s.substr(i,7);	
			if (now == str) {
				ans++;
				i = i + 6;
			}
		}
	}	
	cout << ans << '\n';
}	

signed main()
{
	ios::sync_with_stdio(false);cin.tie(nullptr);
	int T = 1;
	cin >> T;
	while (T--) GENSHEN_START();
	return 0;
}