[algogeeks] Cryptarithmetic problems

[Rave Hanker]

Hello,
I was asked this in my ICPC qualifiers. Are there any good algorithms to solve Cryptarithmetic problems http://en.wikipedia.org/wiki/Send%2Bmore%3Dmoney   like
 SEND
+MORE
------------
MONEY

where each character should be assigned a unique digit.

One more constraint i got was to sort the answer by the value of the first operand

--
Well," said Owl, "the customary procedure in such cases is as follows."
"What does Crustimoney Proseedcake mean?" said Pooh. "For I am a Bear of Very Little Brain, and long words Bother me."
"It means the Thing to Do."
"As long as it means that, I don't mind," said Pooh humbly.
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