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# Using zip()

I tried using zip() function to return results for this challenge, but I don't understand why the output is incorrect.

combo.py
```# combo([1, 2, 3], 'abc')
# Output:
# [(1, 'a'), (2, 'b'), (3, 'c')]
def combo(x, y):
return zip(x, y)
```

I think it's pretty clear on the Bummer! message you received from using `zip()` to solve this problem. The instructor wants you to get some practices on the materials covered in the previous lectures, which means solving this code challenge by applying the Python knowledge we've learned so far in the course.
I agree that `list(zip(x,y))` is a shortcut to solving this problem, but the whole idea of this code challenge is that you're supposed to write a simplified version of `zip()` in your own code; and making use of the `zip()` written by someone else defeats the purpose of practicing.