Extract Substring (of varying length) within a String (of varying length)

Summary

How to extract a sub string from within a string

Content

Hi There, I have a situation where I have a text string of the format. To be precise it is the Grade Code in Fusion HCM. XXXX-NNN-YYYY All of X, N and Y can be of varying lengths. The only distinguishing character I can use is '-' Is there anyway I can extract the NNNs between the two dashes ('-')? Thanks, SS