#include <iostream>
#include<bits/stdc++.h>
using namespace std;

int main() {
	// your code goes here
	vector<int>arr={1,3,4,5};
	for(auto it=arr.rbegin();it!=arr.rend();it++){
		cout<<*it<<endl;
	}
		for(auto it=arr.begin();it!=arr.end();it++){
		cout<<*it<<endl;
	}
	
	return 0;
}