T = int(input())

while T > 0:
    T -= 1
    K, X, Y = map(int, input().split())
    A = list(map(int, input().split()))
    P = list(map(int, input().split()))

    nim = 0
    for k in range(K):
        nim ^= A[k] % (P[k]+1)
    
    if nim == 0:
        if Y >= X:
            print('C')
        else:
            print('Z')
    else:
        if Y >= X + nim:
            print('C')
        else:
            print('Z')