#include<iostream>
using namespace std;
int main()
{
    int height;
    cin>>height;
    if(height<1||height>26)
    {
        cout<<"Invalid input"<<endl;
    }
    
    for(int i=1; i<=height;i++)
    {
        for(char ch= 'A';ch < 'A';ch++)
    }
}