我有这样的文件：
- REPORT_100_COMPLETED.csv
- REPORT_100_FAILED.csv
- REPORT_101_COMPLETED.csv
- REPORT_101_FAILED.csv
- REPORT_102_COMPLETED.csv
- REPORT_102_FAILED.csv
我希望所有这些都根据相关的 id 放入子文件夹中：
100
| REPORT_100_COMPLETED.csv
| REPORT_100_FAILED.csv
101
| REPORT_101_COMPLETED.csv
| REPORT_101_FAILED.csv
102
| REPORT_102_COMPLETED.csv
| REPORT_102_FAILED.csv
等等，有人可以帮忙吗？先感谢您！