Q=int(input())
for _ in range(Q):
  V,X,f1,f2,q,r=map(int,input().split())
  if f1>=f2:
    print('Zero')
    continue
  if X+(f2-f1)*r>V:
    print('Overflow')
    continue
  tin=r*f2
  tout=q*f1
  if tin>tout:
    print('Overflow')
  elif tin<tout:
    print('Zero')
  else:
    print('Safe')