for _ in range(int(input())):
    v,x,f,g,q,r = map(int,input().split())
    y = x+(g-f)*r; o = 0
    if y>v: o = 1
    y -= f*(q-r)
    if o or y>x: print("Overflow")
    elif y<x: print("Zero")
    else: print("Safe")