0: main
1: main
1: ForkJoinPool.commonPool-worker-3
1: ForkJoinPool.commonPool-worker-5
3: ForkJoinPool.commonPool-worker-5
3: main
5: ForkJoinPool.commonPool-worker-5
5: main
7: ForkJoinPool.commonPool-worker-5
8: main
8: ForkJoinPool.commonPool-worker-3
10: ForkJoinPool.commonPool-worker-5