棋子移动

#include <bits/stdc++.h>
using namespace std;
int qz(int a){
	if(a==4){
		cout<<"4,5-->9,10"<<endl;
		cout<<"8,9-->4,5"<<endl;
		cout<<"2,3-->8,9"<<endl;
		cout<<"7,8-->2,3"<<endl;
		cout<<"1,2-->7,8"<<endl;
	}else{
		cout<<a<<","<<a+1<<"-->"<<2*a+1<<","<<2*a+2<<endl;
		cout<<2*a-1<<","<<2*a<<"-->"<<a<<","<<a+1<<endl;
		return qz(a-1);	
	}
	
}
int main(){
	int n;
	cin>>n;
	qz(n);
	return 0;
}