#include <stdio.h>
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000000



int main(){
	
	int _T;
	cin>>_T;
	
	rep(_,_T){
		int K;
		cin>>K;
		
		long long X,Y;
		cin>>X>>Y;
		
		vector<long long> A(K),P(K);
		rep(i,K)scanf("%lld",&A[i]);
		rep(i,K)scanf("%lld",&P[i]);
		
		int t = 0;
		rep(i,K){
			if(A[i] % (P[i]+1) != 0)t ^= 1;
		}
		
		if(t==0){
			if(X<=Y)cout<<"C"<<endl;
			else cout<<"Z"<<endl;
		}
		else{
			if(X<=Y-1)cout<<"C"<<endl;
			else cout<<"Z"<<endl;
		}
	}
	
    return 0;
}