In this task, you're given a review from Amazon. Your task is to generate a rating for the product on a scale of 1-5 based on the review. The rating means 1: extremely poor, 2: poor, 3: neutral, 4: good, 5: extremely good.

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: 1
Example explanation: The user seems very disappointed in the product. Because the bulb they ordered has been burned out earlier than usual. So, he gave 1 star to the review considering it extremely poor
Q: The hair out of the pack is very soft & silky. Hair has a slight smell to it (hopefully it will wash out). The bundle are very thin. Im going to buy a scale because there is no way these bundles are 100 grams. I will be updating after wash then another after install! Update: I was able to wear this hair from mid July to early September. The photos show the hair from initial install to last week on use in order. Hair comes back to life after each wash but starts to get more and more tangles. The hair sheds like crazy the hair wasn't as full as I like but was well worth the price. I will buy again
A:
4