#include <stdio.h>
#include <conio.h>
int main()
{
int i,j;
int b=0;
for (i=2;i<=100;i++){
for (j=2;j<=i;j++){
if (i%j==0){
break;
}
}
if (i==j)
print f("\n%d",j);
}
getch ();
}