#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <cassert>
#include <fstream>
#include <utility>
#include <functional>
#include <time.h>
#include <stack>
#include <array>
#include <list>
#include <atcoder/all>
#define popcount __builtin_popcount
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef pair<int, int> P;

int main()
{
    double a; cin>>a;
    int p=(int)(a*1000+0.1), q=1000;
    int g=gcd(p, q);
    p/=g, q/=g;
    if((p+q)%2==0) cout<<"A ";
    else if(q%2==0) cout<<"C ";
    else cout<<"B ";
    int ans=p+q-2;
    ans+=(p+q)/2;
    ans+=abs(p-q)/2;
    cout<<ans<<endl;
    return 0;
}