public class Main{

public static void main(String[]args){
    for(int i = 30;i<100;i++){
        int x = i*i;
        if(x>999){
           int a = x%10;
           int b = ((x-a)/10)%10;
           int c = (((x-a)/10-b)/10)%10;
           int d = ((((x-a)/10-b)/10-c)/10)%10;
           if(a==b && c==d && a!=c){
               int result = i*i;
               System.out.println(result);
           }
        }
    }
}

}