N = int(input())
for i in range(N):
    V, X, Fo, Fi, Q, R = map(int, input().split())
    I = Fi * R
    O = Fo * Q
    C = I - O
    if C > 0 or (C == 0 and I > O):
        print("Overflow")
    elif C < 0 or (C == 0 and I < O):
        print("Zero")
    else:
        print("Safe")