public class Employee
{
    private Long id;
    private String firstName;
    private String lastName;

    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
    @Override
    public String toString() {
        return "Employee [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + "]";
    }
}

public class Manager extends Employee
{
    private List<Employee> subordinates;

    public List<Employee> getSubordinates() {
        return subordinates;
    }

    public void setSubordinates(List<Employee> subordinates) {
        this.subordinates = subordinates;
    }

    @Override
    public String toString() {
        return "Manager [subordinates=" + subordinates + ", details=" + super.toString() + "]";
    }
}

public class Main {
    public static void main(String[] args)
    {
        Manager mgr = new Manager();
        mgr.setId(1L);
        mgr.setFirstName("Filan");
        mgr.setLastName("Fisteku");

        System.out.println(mgr);
    }
}