#include<bits/stdc++.h>
#define int long long
using namespace std;
char c;
signed main(){
cin >> c;
int n = c - 'A' + 1;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n - i; j++) cout << " ";
for (int j = 1; j <= i; j++) cout << (char)('A' + j - 1);
for (int j = i - 1; j >= 1; j--) cout << (char)('A' + j - 1);
cout << endl;
}
return 0;
}