#include<iostream> using namespace std; int main(){ int n; cin>>n; for(int i=1;i<=n;i++){ for(int j=1;j<=n+(n-1);j++){ if(j+i<=n&&j-i<=n+1||j+i>n*2&&j+i<=n*3-1)cout<<" "; else cout<<"A"; } cout<<endl; } return 0; }