The mark consists of the green stylized letters AES, which are composed of three circles with identical size interconnected from left to right with a sine curve line; the first 1/3 section of the sine curve line including a first curve trough which connects from left to right of the left circle; the second 1/3 section of the sine curve line including a curve crest which connects from left to right of the middle circle; the third 1/3 section of the sine curve line including a second curve trough which connects from left to right of the right circle; the left circle having a gap at its bottom; the middle circle having a gap at its right side immediately under the sine curve line; the right circle have two gaps, one at its right side immediately above the sine curve line, and the other at its left side immediately under the sine curve line; the three circles and the sine curve line are in green color; the three circles and the sine curve line having an identical width or substantially same width.