#include <iostream>
int main()
{
int t, n;
std::cin >> t;
for (int i = 0; i < t; i++)
{
std::cin >> n;
std::cin.ignore();
std::string ciag;
std::getline(std::cin, ciag);
for (int j = ciag.length()-1; j >=0; j--)
{
std::cout << ciag[j];
}
std::cout <<std::endl;
}
}
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