#include <iostream>
using namespace std;

int gcd(int a, int b){
    if (a<b) swap(a, b);
    if (b==0) return a;
    return gcd(b, a%b);
}

int main(){
    int whole, dec; scanf("%d.%d", &whole, &dec);
    int N = whole*1000+dec;
    int g = gcd(N, 1000);
    int x=1000/g, y=N/g;
    char point;
    if ((x-y)%2==0) point = 'A';
    else if (x%2==1) point = 'B';
    else point = 'C';

    int ref = 0;
    ref += x+y-2;
    ref += (x+y)/2;
    ref += abs(x-y)/2;
    printf("%c %d\n", point, ref);
}