Sunday Times Teaser 3000 – The Three Thousandth

by Richard England

Published Sunday March 22 2020 (link)

__T H R E E
+ T H O U S
+ A N D T H
===========
T E A S E R
===========

In this addition digits have been consistently replaced by letters, different letters representing different digits. But instead of an addition in base 10 in which the letters represent the digits 0 to 9 this is an addition in base 11, using X for the extra digit, in which the letters represent the digits 1 to X, with 0 unused.

Please submit the number (still in base 11) represented by TEASER.