#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using mint = modint998244353;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repf(i, n, flag) for (int i = 0; i < (int)(n) && flag; i++)
#define all(v) v.begin(), v.end()


using T = tuple<ll, ll, ll>;
ll solve() {
    ll a, b, c, k;
    cin >> a >> b >> c >> k;
    vector<ll> his;
    map<T, ll> his_m;
    int f, r;
    for(int i = 0;; i++) {
        his_m[{a, b, c}] = i;
        his.push_back(a+b+c);
        ll na = (b+c) / 2;
        ll nb = (c+a) / 2;
        ll nc = (a+b) / 2;
        a = na, b = nb, c = nc;
        if(his_m.count({a, b, c})) {
            f = his_m[{a, b, c}];
            r = i - f + 1;
            break;
        }
    }
    
    if(k < f) return his[k];
    return his[(k-f)%r + f];
}

int main() {
    int t;
    cin >> t;
    while(t--) cout << solve() << endl;
}