#include<iostream>
using namespace std;
void printAlphabet(int height){
    for(int i=1;i<=heigth;++i){
        for(int j=0;j<1;++j){
static_cast<char>('A'+j);
        }
        cout<<endl;
    }
}
int main(){
    int input_height;
    cin>>input_height;
    printAlphabetTriangle(height);
    return 0;
}