I am trying to match specific numeric pattern from the below list.
My requirement is to match only `report.20150325` to `report.20150331`. Please help.

```
report.20150319
report.20150320
report.20150321
report.20150322
report.20150323
report.20150324
report.20150325
report.20150326
report.20150327
report.20150328
report.20150329
report.20150330
report.20150331

```