Can anyone know what mistake I am doing
package com.codegym.task.task04.task0427;
/*
Describing numbers
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
//write your code here
BufferedReader r = new BufferedReader(new InputStreamReader (System.in));
String a = r.readLine();
int a1 = Integer.parseInt(a);
if(a1<10 && a1 % 2 == 0){
System.out.println("even single-digit number");
}
else if(a1<10 && a1 % 2 != 0){
System.out.println("odd single-digit number");
}
else if(a1>9 && a1 % 2 == 0 && a1<100){
System.out.println("even two-digit number");
}
else if(a1>9 && a1 % 2 != 0 && a1<100){
System.out.println("odd two-digit number");
}
else if(a1>99 && a1<=999 && a1 % 2 == 0){
System.out.println("even three-digit number");
}
else if(a1>99 && a1<=999 && a1 % 2 != 0){
System.out.println("odd three-digit number");
}
}
}