в чём может быть проблема? спасибо.

public class Solution {
    public static void main(String[] args) {
        Man man1 = new Man();
        Man man2 = new Man();
        System.out.println(man1.name + " " + man1.age + " " + man1.address);
        System.out.println(man2.name + " " + man2.age + " " + man2.address);
        Woman woman1 = new Woman();
        Woman woman2 = new Woman();
        System.out.println(woman1.name + " " + woman1.age + " " + woman1.address);
        System.out.println(woman2.name + " " + woman2.age + " " + woman2.address);


    }

    public static class Man {
        String name;
        String address;
        int age;

        public Man(String name, String address, int age) {
            this.name = name;
            this.address = address;
            this.age = age;

        }

    }

    public static class Woman {
        String name;
        String address;
        int age;

        public Woman(String name, String address, int age) {
            this.name = name;
            this.address = address;
            this.age = age;

        }

    }
}