Subsequence function

[nilamo]

Also, here ya go :)

>>> is_subseq = lambda x, y: set(x) == set(x) & set(y)
>>> is_subseq('13', '123')
True
>>> is_subseq('india', 'indonesia')
True
>>> is_subseq('13', '1245')
False
>>> is_subseq('123', '13')
False