[Haskell] Constraint Satisfaction Problem

[K Sai Anirudh]

Hello,

I tried to solve simple constraint satisfaction problem. This is my code "
http://pastebin.com/VAaRYSEA " . This gives solution for present list of
domains, but when I change the domain of 'd' in the list 'ld' then I get
error. I think the error is in line 52. I indexed the first value, but I
tried filtering the results where all the variables are assigned and I get
error.

Thanks for any help
Sai
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