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

The user is trying to answer the question: "what is the last 4 digits of a zip code called?" whose answer is add-on codes.
Each document should contain about 30 words, and these documents should contain noisy information.

Query: what is the last digit of a us zip code called
Noisy Output:

Doc 1: In the US, postal codes are called ZIP codes, and they are composed of five digits. The first digit represents a geographical region, and the
Doc 2: The last two digits in the bigger cities corresponded with the older postal zone number. However, in 1967, it became a must for both third
Doc 3: These last 4 digits represent specific delivery routes within delivery areas. This extra detail means an even more precise matching to a more granular level.
Doc 4: Zip codes are five digits. Zip+4 are nine digits. You've got an extra digit in there from somewhere. There are no six digit Zip codes.
Doc 5: The last two digits represent a specific post office or delivery area within the SCF. In 1983, the United States Postal Service introduced an