#include <iostream>
#include <string>
using namespace std;
int main()
{
int n;
char ch;
cin >> ch ;
n = ch - 'A';
for (int i = 1; i <= n+1; ++i)
{
for (int j = 0;j < i;++j)
{
cout << ch;
--ch;
}
cout <<endl ;
ch = 'A'+n;
}
return 0;
}
