#include?<math.h>
int?prime(int?n)?{
int?i,flag?=?1;
if(n?<?2)?return?0;
for(i?=?2;i?<=?sqrt(n)?&&?flag;?++i)
flag?=?n%i;
return?flag;
}
int?main()?{
int?i,n?=?300,cnt?=?0;;
for(i?=?3;?i?<=?n;?++i)?{
if(prime(i))?{
++cnt;
printf("%4d",i);
if(cnt%10?==?0)?printf("\n");
}
}
return?0;
}