/* 
program to  find the location of the origin (0,0) with respect to the line joining the two points.
 * Author: rahule@icse.iitk.ac.in
 *
 * Created on 14 August, 2010, 1:02 AM
 */

#include <stdio.h>

int main()
{
    double x1,x2,y1,y2,a,b;
    printf("\nEnter the coordinates of two points\n");
    scanf("%lf%lf%lf%lf",&x1,&x2,&y1,&y2);
    a=(y2-y1)/(x2-x1);          //finding a,b where y=ax+b is the equation of the line
    b=y1-x1*(y2-y1)/(x2-x1);
    if(b>0)         //origin is bellow the line
    {
        if((-b)/a>0)        //origin is in the left side of the line
            printf("lb");
        else                //origin is in the right side of the line
            printf("rb");

    }
    else             //origin above the line
    {
         if((-b)/a>0)
            printf("la");       //origin is in the left side of the line
        else
            printf("ra");       //origin is in the right side of the line

    }
}