#include <iostream>
#include <fstream>
#include <iomanip>
#include <math.h>
#define pi 3.1415
using namespace std;

int main()
{
    const int n = 4;
    float arr[n], arr2[n], sum = 0;

    for (int i = 0; i < n; i++)
    {
        cin >> arr[i];
    }

    for (int i = 0; i < n; i++)
    {
        arr2[i] = 1 - ( (arr[i] - 1) / 8 );
    }

    for (int i = 0; i < n; i++)
    {
        cout << "C" << i << " = " << arr2[i] << endl;
        sum += arr2[i];
    }

    cout << "sum = " << sum << endl;

    for (int i = 0; i < n; i++)
    {
        cout << "B" << i << " = " << arr2[i] / sum << endl;
    }

    return 0;
}