import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        System.out.println("even , odd");
  
    
   for (int i=0; i<20;i++)
   {
      
     if (i%2!=0)
     { 
         System.out.println(i);
     }   



       else if (i%2==0){
System.out.print("  ");
         System.out.print(i+"  ,  ");
}


}



       
   
      // System.out.print("\nthese are odd numbers\n");
   
   //     for (int i=0; i<20;i++)
   // {
      
   //   if (i%2==0)
   //   { 
      
   //       System.out.print(i+",");
   //   } 
       
   // }  
   //     System.out.print("\nthese are even numbers");
   
       
        
    
    
    
}}