The priests perform what is called the nesiat kapayim or the “Priestly Blessing”, that accompanies the prayer service. The Levites use two hands with the thumbs touching and fingers paired and split, and extended outward for the Shin gesture forming the letter Shin (שׁ), an emblem for Shaddai, "Almighty [God]" which can be seen in the image below.
This ancient hand sign of the Levites was made famous in modern times during the 1960's-70's when the TV cult classic called StarTrek with one of the lead Jewish actors, Leonard Nimoy who played the pointed ear half human and half Vulcan named Spock...
.
I can see the letter shin here ...
That is great comments