void main()
{
    int m,n,i,k,a[10000],j=0,p;
    scanf("%d",&m);
    for(n=3;n<m;n=n+2)
    {
    k=sqrt(n);
    for (i=2;i<=k;i++)
    {if (n%i==0) break;}

    if (i>=k+1) {a[j]=n;j++;}
    }



    for (i=0;i<j-1;i++)
        for (p=i;p<j;p++)
        {if (a[i]+a[p]==m) printf("%d %d\n",a[i],a[p]);}

}
