Bates Had To Die - Enterprise imprints

Do you see Zodiac, Zoidac or Zodica on this letter?

I found this image on Jake Wark's this is the Zodiac speaking site, another version of the image on Eduard Versluijs' Cheri Jo Bates murder site and a lesser quality version in Graysmith's Zodiac Unmasked. When I was experimenting with Photoshop, I found what looks to be the word Zodiac, or a word that looks like it.

Some letters are more prominent depending on the effect used so I put a number of them up.

** There are 3 different words: Zodiac, Zodica, and Zoidca. The word 'Zoidca' looks like the letter i is on top of the letter D, which is on top of the letter C. This is why I have the green i, the blue D, and the green C.

Original - Letter - Rollovers - Animated Gif

Inverted Original - Letter - Rollovers - Animated Gif

Original with contrast - Letter - Rollovers - Animated Gif

Inverted with contrast - Letter - Rollovers - Animated Gif