Im getting this error (labeled in red) and It is the exact one as my result. I don't know what is going on. How do I fix it?

Tasks > Terminal + 0.00 out of 10.00 The Diagonalos program outputs correct pattern. Diagonalos.java + 1 public class Diagonalos { 2 public static void main(String[] args) { 3 for(int a = 0; a Output sandbox $ rm -f * class sandbox sandbox sandbox javac Diagonalos.java sandbox $ java Diagonalos 0 0 0 0 0 0 0 0 8 0 0 0 0 0 0 0 1 public class Diagonalos { 2 public static void main(String[] args) { 3 for(int a = 0; a