#include <bits/stdc++.h>
using namespace std;
int gcd(int a, int b){
  if (b == 0){
    return a;
  } else {
    return gcd(b, a % b);
  }
}
int main(){
  string a;
  cin >> a;
  a.erase(a.end() - 4);
  int num = stoi(a);
  int den = 1000;
  int g = gcd(num, den);
  int y = num / g;
  int x = den / g;
  if ((x + y) % 2 == 0){
    cout << 'A';
  } else if (x % 2 == 1){
    cout << 'B';
  } else {
    cout << 'C';
  }
  cout << ' ';
  cout << (x - 1) + (y - 1) + (x + y) / 2 + abs(x - y) / 2 << endl;
}