unable to pass the last condition

package com.codegym.task.task08.task0824; import java.util.*; import java.util.ArrayList; /* Make a family */ public class Solution { public static void main(String[] args) { //write your code hereSystem.out.println(c1.toString()); ArrayList<Human> generation_1 = new ArrayList<Human>(); ArrayList<Human> generation_3 = new ArrayList<Human>(); ArrayList<Human> generation_2 = new ArrayList<Human>(); Human c1 = new Human("nvkvslk",23,true,generation_1); Human c2 = new Human("nvkvslk",23,true,generation_1); Human c3 = new Human("nvkvslk",23,true,generation_1); Human f = new Human("fwik",23,true,generation_2); Human m = new Human("fwik",23,false,generation_3); generation_1.add(f); generation_1.add(m); Human gm = new Human("jksdfn",23,false,generation_3); Human gm1 = new Human("jksdfn",23,false,generation_2); Human gf = new Human("jksdfn",23,true,generation_2); Human gf1 = new Human("jksdfn",23,true,generation_3); System.out.println(c1.toString()); System.out.println(c2.toString()); System.out.println(c3.toString()); System.out.println(f.toString()); System.out.println(m.toString()); System.out.println(gm.toString()); System.out.println(gm1.toString()); System.out.println(gf1.toString()); System.out.println(gf.toString()); } public static class Human { //write your code here String name; boolean sex; int age; ArrayList<Human> children = new ArrayList<>(); Human(String name , int age , boolean sex , ArrayList <Human> children) { this.name=name; this.age=age; this.sex=sex; this.children=children; } public String toString() { String text = ""; text += "Name: " + this.name; text += ", sex: " + (this.sex ? "male" : "female"); text += ", age: " + this.age; int childCount = this.children.size(); if (childCount > 0) { text += ", children: " + this.children.get(0).name; for (int i = 1; i < childCount; i++) { Human child = this.children.get(i); text += ", " + child.name; } } return text; } } }