import java.util.Scanner;

public class No1020 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int k = sc.nextInt();
        String str = sc.next();
        char[] c = str.toCharArray();
        for(int i=0;i<=(n-k);i++) {
            char[] newC = c.clone();
            for(int j=0;j<k;j++){
                newC[i+j]=c[i+(k-j)-1];
            }
            c=newC;
        }
        System.out.println(c);
    }
}