#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main() {
    double a;
    cin >> a;

    int x = 1000;
    int y = (int)round(a * x);
    int g = gcd(x, y);
    x /= g;
    y /= g;

    char r;
    if ((x + y) % 2 == 0) {
        r = 'A';
    } else if (x % 2 == 1) {
        r = 'B';
    } else {
        r = 'C';
    }
    cout << r << ' ' << (x - 1 + y - 1 + (x + y) / 2 + abs(x - y) / 2) << endl;

    return 0;
}