using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;
using System.Globalization;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    static int[] NMi => ReadLine().Split().Select(c => int.Parse(c) - 1).ToArray();
    static int[][] NMap(int n) => Enumerable.Repeat(0, n).Select(_ => NMi).ToArray();

    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (n, k) = (c[0], c[1]);
        var s = ReadLine();
        var ans = new List<char>();
        ans.AddRange(s.Skip(k - 1));
        if ((n - k + 1) % 2 == 0) ans.AddRange(s.Take(k - 1));
        else ans.AddRange(s.Take(k - 1).Reverse());
        WriteLine(string.Concat(ans));
    }
}