You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did the price of stamps last go up?" whose answer is January 21, 2018.
Each document should contain about 30 words, and these documents should contain useful information.

Query: recent stamp price increases
Useful Output:

Doc 1: First-class stamp prices are set to rise by 3% from 7 April – Martin Lewis' MoneySavingExpert explains how you can beat the increase.
Doc 2: The increase, which will kick in from 7 October, will see the price of a first-class stamp rise to £1.65, while second-class stamps will remain
Doc 3: To see current prices please visit royalmail.com/current-postage-prices. Price changes from 7 April 2025. Price Changes for personal customers and marketplace
Doc 4: The USPS has announced they are increasing the price of postage on July 13, 2025. You could stock up on stamps now, or you could get a
Doc 5: Americans could see the price of a first-class Forever stamp go up five more cents, from 73 to 78 cents, starting July 13.