T=int(input())
for _ in range(T):
  v,x,fo,fi,q,r=map(int, input().split())
  pl=(fi-fo)*r
  mi=-fo*(q-r)
  if pl+x>v:
    print('Overflow')
  elif pl+mi==0:
    print('Safe')
  elif pl+mi<0:
    print('Zero')
  else:
    print('Overflow')