In this task, You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.

Example input: These are junk! Both bulbs have burned out within a two month period!! I cannot believe that this company can be in business with such poor quality. I have used infrared lights for my ball python for many years now and I get a varied range of months from a bulb, but I have never gone through two bulbs in a matter of two months! I am very disappointed.
Example output: negative
Example explanation: The user seems very disappointed in the product. Because the bulb they ordered has been burned out earlier than usual. So, it's a negative review.
Q: If you didn't get results from this then you're doing something wrong or you didn't wait the full time. I've read in a couple negative reviews where it says, it's been 2 weeks still no coralline, you guys have got to be kidding I hope. It says right on the bottle and in the directions that it can take up to 8 weeks. If you are having trouble with this product then you need to test your aquariums water. I have used this in 2 separate tanks now and between 1 and 3 months I got an explosion of really nice different colors all over my rock. I have some green algae from before but it now won't grow on any rocks that have the spots on them. Will never run a tank again without using this.
A:
positive