Was muss ich ändern?
package de.codegym.task.task07.task0720;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;
/*
Gerade noch rechtzeitig gemischt
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
ArrayList<String> liste = new ArrayList<String>();
int N = Integer.valueOf(reader.readLine()).intValue();
int M = Integer.valueOf(reader.readLine()).intValue();
for( int i = 0 ; i<N; i++){
String s = reader.readLine();
liste.add(s);
}
for (int i = 0; i < M; i++) {
liste.add(8, liste.get(0));
liste.remove(0);
}
for (int i = 0; i < liste.size(); i++) {
System.out.println(liste.get(i));
}
}
}