Strict Batch Processor

You are designing a data ingestion pipeline. Data items are collected in a queue. Items must be released in batches of exactly size K. If a special 'FLUSH' command enters the queue, all currently queued items must be released immediately as a partial batch. Write a program that reads K and a sequence of strings, and prints each released batch on a new line with items separated by hyphens. Example: Input: 3 A B C FLUSH D E F G FLUSH Output: A-B-C D-E-F G