I don't understand what i did wrong here. What does it want me to do ?
package en.codegym.task.jdk13.task04.task0427;
import java.io.BufferedReader;
import java.io.InputStreamReader;
/*
Describing numbers
*/
public class Solution {
public static void main(String[] args) throws Exception {
//write your code here
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String nums = reader.readLine();
int a = Integer.parseInt(nums);
if (a % 2 == 0 && a < 10){
System.out.println("even single-digit number");
}
else if (a % 2 != 0 && a < 10){
System.out.println("odd single-digit number");
}
else if (a % 2 == 0 && a < 100){
System.out.println("even two-digit number");
}
else if (a % 2 != 0 && a < 100){
System.out.println("odd two-digit number");
}
else if (a % 2 == 0 && a < 1000){
System.out.println("even three-digit number");
}
else if (a % 2 != 0 && a < 1000){
System.out.println("odd three-digit number");
}
else if (a < 1 && a > 999){
}
}
}