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

double a;
int n;

int gcd(int p, int q) {
	if (q == 0)
		return p;

	return gcd(q, p % q);
}

int main()
{
	cin >> a;

	a *= 1000;
	n = (int)a;
	
	int g = gcd(n, 1000);

	n /= g;
	int d = 1000 / g;

	if ((n + d) % 2 == 0)
		cout << "A ";
	else if (d % 2 == 1)
		cout << "B ";
	else
		cout << "C ";

	cout << n + d + max(n, d) - 3 + max(n, d) % 2 << endl;
}