#include <stdio.h>
int main()
{
	int a , sum = 0 , b , i;
	printf (" enter the number ");
	scanf ("%d" , &a);
	for (i = 3 ; i <= a ; i = i+3)
	{
		b = sum+i;
		printf ("%d " , b);
	}
	return 0;
}