#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <cassert>
#include <fstream>
#include <utility>
#include <functional>
#include <stack>
#include <array>
#include <list>
#define popcount __builtin_popcount
using namespace std;
typedef long long int ll;
typedef pair<int, int> P;

int main()
{
    int t; cin>>t;
    while(t--){
        ll s=0;
        ll a[1010], p[1010];
        int k; ll x, y; cin>>k>>x>>y;
        for(int i=0; i<k; i++){
            cin>>a[i];
        }
        for(int i=0; i<k; i++){
            cin>>p[i];
            s^=(a[i]%(p[i]+1));
        }
        //cout<<s<<" "<<x<<" "<<y<<endl;
        if(s==0){
            if(x<=y) cout<<"C"<<endl;
            else cout<<"Z"<<endl;
        }else{
            if(x+s<=y) cout<<"C"<<endl;
            else cout<<"Z"<<endl;
        }
    }
    return 0;
}