regex help

[bill]

So say i wanted to created a regex that,but one part of the value is constantly alternating. Here's a example of the values:

1371210_textResponse
9832210_textResponse
5973210_textResponse
0972110_textResponse


so as you can see the first part of the value changes, but the second part remains stable. How can I write the regex so it work for any random number in the first part of the above values?

 

[Tobbe]

\d+(?=_textResponse)

 

[bill]

Thanks again Tobbe,

How would I reverse it? for example: TextResponse_0972110

 

[rostonix]