List of tuple to string in Python

I have a list like this:

l = ['b', '7', 'a', 'e', 'a', '6', 'a', '7', '9', 'c', '7', 'b', '6', '9', '9', 'd', '7', '5', '2', '4', 'c', '7', '8', 'b', '3', 'f', 'f', '7', 'b', '9', '4', '4']

and I want to make a string from it like this:

7bea6a7ac9b796d957427cb8f37f9b44

I did:

l = (zip(l[1:], l)[::2])
s = []
for ll in l:
    s += ll
print ''.join(s)

But is there any simpler way? May be, in one line?