/******************************************************************************
Welcome to GDB Online.
GDB online is an online compiler and debugger tool for C, C++, Python, Java, PHP, Ruby, Perl,
C#, VB, Swift, Pascal, Fortran, Haskell, Objective-C, Assembly, HTML, CSS, JS, SQLite, Prolog.
Code, Compile, Run and Debug online from anywhere in world.
*******************************************************************************/
#include <iostream>
using namespace std;
int main()
{
int i,j,n;
cout<<"enter "<<endl;
cin>>n;
char c='A';
for(i=n; i>0; i--)
{
for(j=i; j>0; j--)
{
cout<<c;
}
cout<<endl;
c++;
}
return 0;
}