import java.util.Scanner;
public class PronicNumbersInGivenRange
{
    /*isPronicNumber() will determine whether a given number is pronic number or not*/
    public static boolean isPronicNumber(int num)
    {

        boolean flag = false;

        for(int j = 1; j <= num; j++)
        {
            /* Checks for pronic number by multiplying consecutive numbers */
            if((j*(j+1)) == num)
            {
                flag = true;
                break;
            }
        }
        return flag;
    }

    public static void main(String[] args)
    {
        int lowerRange=0,upperRange=0,i=0;
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter the lower range");
        lowerRange=sc.nextInt();
        System.out.println("Enter the Upper range");
        upperRange=sc.nextInt();
        //Displays pronic numbers between lowerRange and upperRange
        System.out.println("Pronic numbers between "+lowerRange+" and "+upperRange);
        for(i = lowerRange; i <=upperRange; i++)
        {
            if(isPronicNumber(i))
            {
                System.out.print(i + " ");
            }
        }
    }
}