#include<iostream>
#include<vector>
using namespace std;
using ul= unsigned long;

int main() {
	int T;
	cin >> T;

	ul K, X, Y;
	ul G;
	vector<ul> A(3000), P(3000);

	for (int t = 0; t < T; t++) {
		cin >> K >> X >> Y;

		for (int k = 0; k < K; k++) {
			cin >> A[k];
		}

		for (int k = 0; k < K; k++) {
			cin >> P[k];
		}

		G = 0;
		for (int k = 0; k < K; k++) {
			G ^= A[k] % (P[k] + 1);
		}

		if ((Y >= G) && (Y - G >= X)) {
			cout << "C" << endl;
		}
		else {
			cout << "Z" << endl;
		}
	}
}