#include<iostream>
using namespace std;
int main()
{
    int arr[];
    int i, n;
    cin>>n;
    for(i=0){
        cout<<"invalid output"<<endl;
    }
}int d;
if (i<0){
    cout<<"invalid input"<<endl;
}
else{
    cout <<"5 4 3 2 1"<<endl;
}
}