## Relevant Articles:

- [Count Occurrences Using Java groupingBy Collector](https://www.baeldung.com/java-groupingby-count)
- [How to Split a Stream into Multiple Streams](https://www.baeldung.com/java-split-stream)
- [Filter Java Stream to 1 and Only 1 Element](https://www.baeldung.com/java-filter-stream-unique-element)
