#include <bits/stdc++.h>
using namespace std;
void err(istream_iterator<string> it) {}
template <typename T, typename... Args>
void err(istream_iterator<string> it, T a, Args... args) {
  cerr << *it << " = " << a << endl;
  err(++it, args...);
}
template <class T>
void umin(T &a, T b) {
  a = min(a, b);
}
template <class T>
void umax(T &a, T b) {
  a = max(a, b);
}
const int mod = 1e9 + 7, N = 1e6 + 5;
void solve() { cout << "A"; }
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int T = 1;
  while (T--) solve();
  return 0;
}
