#include<stdio.h>
#include<math.h>
int main(){
  double a,b,c;
  printf("Unesi a i b:");
  scanf("%lf%lf",&a,&b);
  if(a<b){
   c=(b-a)/9;
   double i=a;
   for(i;i<=b+0.000001;i+=c)printf("%.4lf ",cos(i));
  }
  else printf("-1\n");
}

