Looking for a solution on how to best approach this problem

Hello all,

    I am interested in finding the best solution or direction for what I want to do.  I am tired of seeing a wall of text that looks like a computer vomited in Teams chat every time a user posts this information.  I am looking to group the strings together by group name.  Here is the original data, just condensed:

Updated Batch Validation Results:

Update sets associated to release but not in release batch: [ "ABC_Group1_STRY1009926_AD_V2", "ABC_Group1_STRY1006750_AD", "ABC_Group2_STRY1016743_CMA" ]

Update sets not associated to the release but in release batch: [ "ABC_Group1_STRY0978210_AR_Scope", "ABC_Group2_STRY0978210_AR" ]

Stories with update sets in release batch but not associated with release: [ "STRY0978210" ]

What I envision is:

Updated Batch Validation Results:

Update sets associated to release but not in release batch:

[ "ABC_Group1_STRY1009926_AD_V2", "ABC_Group1_STRY1006750_AD"]

["ABC_Group2_STRY1016743_CMA" ]

Update sets not associated to the release but in release batch:

[ "ABC_Group1_STRY0978210_AR_Scope"]

["ABC_Group2_STRY0978210_AR" ]

Stories with update sets in release batch but not associated with release: [ "STRY0978210" ]

What would be a best solution to look into to reformat the Teams message either before or after it has been posted by someone else in a group chat?