Return only numbers directly after specific substring

[RaydenUK]

I could really use some help with a formula... it needs to return the number directly following substring "RX" within a string? For example if i have the string "12354165RX15" then just show "15". Another example is "165163546RX15_G_B" then it would still need to also just show "15". I have tried a few different things with no luck.There shouldn't ever be anymore numbers in the string, other than the one immediately following the "RX". Also note that the number can range from 1-4 digits. Any help would be greatly appreciated.

 

[Rick Rothstein]

With the ";" I have the backslash "\" as column divider and the semicolon ";" as the row divider.

For ex., for L1:N2:

{"L1"\"M1"\"N1";"L2"\"M2"\"N2"}

Really funny working with both sets of dividers

As I said earlier... "Well, that sounds like fun..."

I am pretty sure switching back and forth would drive me crazy... thank goodness all my computer programming only has only had to deal with a US regional setting (that made things nice and easy for me).