#include <stdio.h>
#include <math.h>


int main()
{ int i;
  double a,b,c;
scanf("%lf%lf",&a,&b);
if(a<b)
{c= (b-a)/9;
printf("%.4lf %.4lf %.4lf %.4lf %.4lf %.4lf %.4lf %.4lf %.4lf %.4lf\n",cos(a),cos(a+c),cos(a+2*c),cos(a+3*c),cos(a+4*c),cos(a+5*c),cos(a+6*c),cos(a+7*c),cos(a+8*c),cos(a+9*c));


}
else printf("%d\n",-1);
  
   
  
  return 0;
}
