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 (X + (Fi - Fo) * R > V):
        print("Overflow")
    else:
        if C > 0:
            print("Overflow")
        elif C < 0:
            print("Zero")
        else:
            print("Safe")