#line 1 "main.cpp"
#include <iostream>
#include <vector>

using namespace std;
using lint = long long;

void solve() {
    int k;
    lint x, y;
    cin >> k >> x >> y;

    vector<lint> ps(k), qs(k);
    for (auto& p : ps) cin >> p;
    for (auto& q : qs) cin >> q;

    lint g = 0;
    for (int i = 0; i < k; ++i) {
        g ^= ps[i] % (qs[i] + 1);
    }

    cout << (y - x >= g ? 'C' : 'Z') << "\n";
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    int q;
    cin >> q;
    while (q--) solve();

    return 0;
}