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 + " ");  
            }
        }  
    }  
}