import javax.swing.*;

public class RequestProcessor {
    public String evenNumbers() {
        String result ="";
        int number = Integer.parseInt(JOptionPane.showInputDialog("Enter number"));
        for (int i = 0; i<number; i++) {
            if (i % 2 == 0)
                result += i + " ";
            if (i % 50 == 0 && i != 0) 
                    result += "\n";
        }
        return result;
    }
    
    public String oddNumbers() {
        String result ="";
        int number = Integer.parseInt(JOptionPane.showInputDialog("Enter number"));
        for (int i = 0; i<number; i++) {
            if (i % 2 != 0) 
                result += i + " ";
            if (i % 50 == 0 && i != 0) 
                result += "\n";
        }
        return result;
    }
}