2nd problem !!
Substitute digits for the letters to make the following addition problem true.
T H A T S
+ E N O U G H
--------------------
C H A N G E
Note that the leftmost letter can't be zero in any word. Also, there must be a one-to-one mapping between digits and letters. e.g. if you substitute 3 for the letter G, no other letter can be 3 and all other G in the puzzle must be 3.