import sys

input = sys.stdin.readline

ans = []
for _ in range(int(input())):
    N,X,Y = map(int,input().split())
    A = list(map(int,input().split()))
    P = list(map(int,input().split()))

    grundy = 0
    for i in range(N):
        tmp = A[i]%(P[i]+1)
        grundy ^= tmp

    if grundy:
        if Y-grundy-X>=0:
            ans.append("C")
        else:
            ans.append("Z")
    else:
        if Y>=X:
            ans.append("C")
        else:
            ans.append("Z")

print(*ans,sep="\n")