If you encountered "zzz xzxzxzxz" inside Photoshop CC 2019 (e.g., as a file name, brush preset, or action), it likely indicates:
Some community-made optimization scripts for CC 2019 use these unique strings to avoid overlapping with official Adobe registry keys. Why Use CC 2019 in 2024 and Beyond? zzz xzxzxzxz photoshop cc 2019