#include <iostream>
#include <string>

void solve() {
    int K;
    std::string S;
    std::cin >> K >> S;

    for (int _ = 0; _ < K; _++) {
        S = S[0] + S;
        S.pop_back();
    }

    std::cout << S << std::endl;
}

int main() {
    int t;
    std::cin >> t;

    for (int _ = 0; _ < t; _++) {
        solve();
    }
}