import java.util.*;
public class Main {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
int N1 = sc.nextInt();
int N2 = sc.nextInt();
int i = 1;
for( ; i<= N1 ; i++ );
{
int res = 3*i + 2;
if(res/N2 == 0){
i = i -1;
}
else
{
System.out.println(res);
}
}
}
}