Подскажите пожалуйста где лажанул.

package com.javarush.task.task07.task0724; /* Семейная перепись */ public class Solution { public static void main(String[] args) { Human grandFatherJon = new Human("Jon",true,55); Human grandFatherNeck = new Human("Neck",true,52); Human grandMotherJule = new Human( "Juli",false,55); Human grandMotherRima = new Human( "Rima",false,48); Human fatherKirk = new Human("Kirk",true,32,grandFatherJon,grandMotherJule); Human motherKlara = new Human("Klara",false,25,grandFatherNeck,grandMotherRima); Human sonBill = new Human("Bill",true,7,fatherKirk,motherKlara); Human sonRoss = new Human("Ross",true,5,fatherKirk,motherKlara); Human daughterMeina = new Human("Meina",false,1,fatherKirk,motherKlara); System.out.println(grandFatherJon.toString()); System.out.println(grandFatherNeck.toString()); System.out.println(grandMotherJule.toString()); System.out.println(grandMotherRima.toString()); System.out.println(fatherKirk.toString()); System.out.println(motherKlara.toString()); System.out.println(sonBill.toString()); System.out.println(sonRoss.toString()); System.out.println(daughterMeina.toString()); } public static class Human { public static String name; public static boolean sex; public static int age; public static Human father; public static Human mother; public Human(String name,boolean sex,int age){ this.name = name; this.sex = sex; this.age = age; } public Human(String name,boolean sex,int age,Human father,Human mother){ this(name,sex,age); this.father = father; this.mother = mother; } public String toString() { String text = ""; text += "Имя: " + this.name; text += ", пол: " + (this.sex ? "мужской" : "женский"); text += ", возраст: " + this.age; if (this.father != null) { text += ", отец: " + this.father.name; } if (this.mother != null) { text += ", мать: " + this.mother.name; } return text; } } }