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


int main()
{

double a, b, t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, x;


scanf("%lf%lf", &a, &b);
if(a>=b) {printf("-1\n"); return -1;}
x=(b-a)/9;
t1=a;
t2=t1+x;
t3=t2+x;
t4=t3+x;
t5=t4+x;
t6=t5+x;
t7=t6+x;
t8=t7+x;
t9=t8+x;
t10=t9+x;

printf("%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf\n", cos(t1), cos(t2), cos(t3), cos(t4), cos(t5), cos(t6), cos(t7), cos(t8), cos(t9), cos(t10));


return 0;
}




