#include<iostream>
using namespace std;
class generate
{
    int n;
    public:
    void getdata();
    void process();
};
void generate::getdata()
{
cout<<"\n Enter the number:"<<endl;
cin>>n;
}
void generate::process()
{
 cout<<"_____Even_____"<<endl;
 for(int i=1;i<=2*n;i++)
    {
      if(i%2==0)
     cout<<i<<""<<endl;
        
    }
cout<<"_____Odd_____"<<endl;
  for(int i=0;i<=2*n;i++)
    {
        if(i%2!=0)
      cout<<i<<""<<endl;
    }
}
int main() {
    cout<<"GENERATE A ODD OR EVEN"<<endl;
    generate x;
    x.getdata();
    x.process();
    return 0;
}