def Map():
  return list(map(int,input().split()))

def solve():
  V,X,F,f,Q,R = Map()
  if f*R - Q*F > 0:
    ans = 'Overflow'
  elif f*R - Q*F < 0:
    ans = 'Zero'
    if X + (f - F)*R > V:
      ans = 'Overflow'
  else:
    ans = 'Safe'
    if X + (f - F)*R > V:
      ans = 'Overflow'
  print(ans)
  return

T = int(input())
for i in range(T):
  solve()