using System.IO; namespace ConsoleApplication1 { class Program { private static TextReader stdin = System.Console.In; private static TextWriter stdout = System.Console.Out; static void Main(string[] args) { int aantal = int.Parse(stdin.ReadLine()); for (int i = 0; i < aantal; i++) { string[] lijn = stdin.ReadLine().Split(' '); int k = int.Parse(lijn[0]); stdout.WriteLine(lijn[1].Substring(k - 1, 1)); } } } }