#include<stdio.h>
#include<stdlib.h>
#define NMAX 10000000
#define SQRN 10000
int main()
{
int n;
static char a[NMAX];
unsigned long k,i;
scanf("%d",&n);
for(k=2;k<=SQRN;k++)
if(!a[k])
for(i=2*k;i<n;i+=k)
a[i]=1;
for(i=2;i<n;i++)
if(!a[i])
{
printf("%ld\n",i);
}
return 0;
}
