(UPDATE) DEFINING exact length of string for ISTEXT within AGGREGATE function

Hi forum,

I have this formula (it was given to me by a member of this forum few days ago):

=IFERROR(AGGREGATE(15,6,$M$25:$W$29/ISTEXT($M$25:$W$29)/(--$M$25:$W$29>MAX(A$33:A33)),1),"")

From the sample attached, I need the 5 digits jobs to go only in the table FULL LOADS and the 4 digits jobs to go only in the table JOBS.

How can integrate a check in the formula so that it is calculated only for a string of a certain length?

Any help would be greatly appreciated!

Thank you,
Alberto