#pragma GCC optimize(2)
#pragma GCC optimize(3)
#include <bits/stdc++.h>
using namespace std;

void debug_out() {cerr << endl;}
template <typename Head, typename... Tail> void debug_out(Head H, Tail... T)
{
    cerr << " " << H;
    debug_out(T...);
}
#ifndef ONLINE_JUDGE
    #define debug(...) cerr << "{" << #__VA_ARGS__ << "}:", debug_out(__VA_ARGS__)
#else
    #define debug(...) 42
#endif

using db = double;
db x[2], y[2], z[2];

db a[2], b[2], c[2];

int main(){
    ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
    cout << fixed << setprecision(15);
    cerr << fixed << setprecision(15);

    while(cin >> a[0] >> b[0] >> c[0] >> a[1] >> b[1] >> c[1]) {
        for (int i = 0; i < 2; i += 1) {
            cin >> x[i] >> y[i] >> z[i];
        }
        if(a[0] > a[1]) {
            x[0] = -x[0];
            x[1] = -x[1];
            a[0] = -a[0];
            a[1] = -a[1]; 
        }
        if(b[0] > b[1]) {
            y[0] = -y[0];
            y[1] = -y[1];
            b[0] = -b[0];
            b[1] = -b[1];
        }
        if(c[0] > c[1]) {
            c[0] = -c[0];
            c[1] = -c[1];
            z[0] = -z[0];
            z[1] = -z[1];
        }
        if(x[0] > x[1]) swap(x[0], x[1]);
        if(y[0] > y[1]) swap(y[0], y[1]);
        if(z[0] > z[1]) swap(z[0], z[1]);
        double res = 0;
        for (int mask = 0; mask < 8; mask += 1) {
            
            db cz = min(c[1], max(c[0], z[mask >> 2 & 1]));
            db r = (c[1] - cz) / (c[1] - c[0]);
            db cx = min(a[0] + (a[1] - a[0]) * r, max(a[0], x[mask >> 0 & 1]));
            db cy = min(b[0] + (b[1] - b[0]) * r, max(b[0], y[mask >> 1 & 1]));
            if(abs(r) < 1e-10) continue;
            db r1 =  (a[0] + (a[1] - a[0]) * r - cx) / (a[1] - a[0]) / r;
            db xx = (b[1] - b[0]) * r * r1;
            db yy = (b[1] - b[0]);
            xx -= cy - b[0];
            if(xx < 0) continue;
            db r2 = 0;
            if(abs(yy) > 1e-10) {
                r2 = xx / yy;
            }
            if(__builtin_parity(mask)) {
                res -= r2 * r2 * r2;
            }
            else res += r2 * r2 * r2;
        }
        res *= (a[1] - a[0]) * (b[1] - b[0]) * (c[1] - c[0]) / 6;
        cout << res << "\n";
    }
    return 0;
}