import sys
readline = sys.stdin.readline

def calc():
    K, Xz, Yc = map(int, readline().split())
    A = list(map(int, readline().split()))
    P = list(map(int, readline().split()))
    gr = 0
    for a, p in zip(A, P):
        gr ^= a%(p+1)
    if Yc < gr:
        return 'Z'
    Yc -= gr
    if Yc >= Xz:
        return 'C'
    else:
        return 'Z'
    
T = int(readline())
Ans = [None]*T

for qu in range(T):
    Ans[qu] = calc()

print('\n'.join(map(str, Ans)))