I have never met such and have not yet excluded two points, but
theoretically it is quite possible, and more likely it will be three points, because perfectly valid symbol for echotag.
For example, ECHO...TAG.
omg. That should not be allowed. :/
--- tg BBS v0.6.3
* Origin: Fido by Telegram BBS by Stas Mishchenkov (2:460/58)