import java.io.*;
import java.util.HashMap;
import java.util.Map;

public class Task3 {
    public static void main(String[] arguments) throws IOException {
        var friends = new HashMap<String, Integer>();

        friends.put("Maximilian Mayer", 20);
        friends.put("Emil Faber", 30);
        friends.put("Anna Müller", 45);
        friends.put("Sebastian Waller", 39);
        friends.put("Oliver Stilz", 25);

        for (Map.Entry<String, Integer> name: friends.entrySet()) {
            System.out.print(name.getKey());
            System.out.print(": ");
            System.out.println(name.getValue());
        }
    }
}