It is difficult to achieve uniqueness on BRC20 with less than four letters. If you add spaces before, after, left and right, there will be more and more character copies. Look at how many character copies there are now. They will always be troubled by this problem. Piin is different. Piin can be Pinetwork Inscription, π/Pi Inscription, or more. Only Piin is unique.

$Piin#Piin#π🦅