#3include <iostream>
using namespace std;
int main(){
    int height;
    cin>>height;
    
    if (height<1||height>26){
        cout<<"Invalid input";
        return 0;
    }
    
    for (int i=0; i<height; i++){
        char letter = 'A';
        for (int j=0;j<1;j++){
            cout<<letter<<" ";
            letter++;
        }
        cout << endl;
    }
    return 0;
}