#include <stdlib.h>
#include <stdio.h>
#include <math.h>
int prime (int num);
int main()
{
 int i;
 int colcnt = 0;
for (i=2; i <= 200000; i++)
 if (prime(i)) {
  colcnt++;
  if (colcnt%9 == 0) {
    printf("%5d\n",i);
    colcnt = 0;
  }
 else
   printf("%5d ", i);
 }
 putchar('\n');
 return 0;
}
int prime (int num) {
 /* check to see if the number is a prime? */
  int i;
  for (i=2; i < (int) sqrt( (float) num); i++)
  //for (i=2; i < num; i++)
  if (num %i == 0)
   return 0;
  return 1;
}