1 //#include<bits/stdc++.h>
2 #include<map>
3 #include<cstdio>
4 #include<string>
5 #include<cmath>
6 #include<iostream>
7 using namespace std;
8 int zhishu(int x){
9 if(x==2||x==3){
10 return 1;
11 }
12 else{
13 int tmp = (int)sqrt(x);
14 if(x%2==0){
15 return 0;
16 }
17 for(int i=3;i<=tmp;i+=2){
18 if(x % i==0)
19 return 0;
20 }
21 return 1;
22 }
23 }
24 int main(){
25 int M;
26 while(scanf("%d",&M)!=EOF){
27 for(int i=M/2;i>=3;--i){
28 if(zhishu(i)==1 && zhishu(M-i)==1){
29 printf("%d %d\n",i,M-i);
30 break;
31 }
32 }
33 }
34
35
36
37 return 0;
38 }
