import sys
input = sys.stdin.readline

T = int(input())
for _ in range(T):
    V, X, Fo, Fi, Q, R = map(int, input().split())
    now = X
    flag = 1
    for _ in range(100):
        now += R * (Fi - Fo)
        if now > V:
            print("Overflow")
            flag = 0
            break
        elif now < 0:
            print("Zero")
            flag = 0
            break
        now -= (Q - R) * Fo
    
    if not flag:
        continue
    if now > X:
        print("Overflow")
    elif now == X:
        print("Safe")
    else:
        print("Zero")