using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    // static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var t = NN;
        var ans = new char[t];
        for (var u = 0; u < t; ++u)
        {
            var c = NList;
            var (k, x, y) = (c[0], c[1], c[2]);
            var a = NList;
            var p = NList;
            var g = 0L;
            for (var i = 0; i < k; ++i) g ^= a[i] % (p[i] + 1);
            if (y - g >= x) ans[u] = 'C';
            else ans[u] = 'Z';
        }
        WriteLine(string.Join("\n", ans));
    }
}