I noticed that, by eliminating the non-alphabetic symbols of the first line leaving only the alphabetic symbols left (see image below) the sequence
H E R V P I L T G
After that eliminating such letters ( H E R V P I L T G) of Z340 code as a whole remaining 289 symbols, which form perfectly 17 rows and 17 columns.
What I found interesting was to have appeared the number 17, which is known to all who follow the case of the infamous zodiac, is closely linked to both the Z340, as the z 408 and partially to the z32.
Finally, I share this idea.
below the "Z 289" in image and text (which allows to work in zkdecrypto)