In this process, I completed the following tasks:

• Zoom interview
• Home task
• Home task review

During the review, they asked me to fix some things, which they sent to me by email.

You have a given text file with all English words. You need to build a runnable service to deploy it on GitHub in a private repository. The service should run on a given port and have two APIs:

1. ?similar=aab

2. ?statistics

3. This API should return all English permutations of the input string, for example: json {"similar": ["aba", "baa"]}

4. This API should return statistics about the service, for example: json {"totalWords": 305000, "totalRequests": "5", "avgProcTime": "1720404"}

You can use any programming language. The system should handle large-scale requests.