Parse complex file format and generate sequence number

[GanguP]

I am trying to parse a file with a complex format.  It hasn't been easy as I am new to Snaplogic.  In the below example, I am trying to combine the four rows.  In order to do that I am thinking to assign the same seqeunce number to the group highlighted in yellow then use Aggregate to combine based on the sequence number.   How do I generate the sequence number?

[GanguP]

The solution worked for the file.  Thank you @koryknick