#include #include #include #include #include #include const int INF=0x3f3f3f3f; const int N=1e5+10; using namespace std; int n; int main() { cin>>n; for(int i = 1;i<=n;i++) { for(int j = 1;j<=n-i;j++) cout<<" ";

for(char j = 'A';j<='A'+i-1;j++)
		cout<<j;
		
	for(char j = 'A'+i-2;j>='A';j--)
		cout<<j;
	cout<<endl;
}

return 0;

}