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# I don't know how to do reverse_evens function.

def first_4(iterable): return iterable[:4]

def first_and_last_4(iterable): return iterable[:4] + iterable[-4:]

def odds(iterable): return iterable[1::2]

def reverse_evens(iterable): return iterable[::-2]

slices.py
```def first_4(iterable):
return iterable[:4]

def first_and_last_4(iterable):
return iterable[:4] + iterable[-4:]

def odds(iterable):
return iterable[1::2]

def reverse_evens(iterable):
return iterable[::-2]
```

Good start! What you have will already work half of the time (depending on the length of the list). To make it work for all cases, there's two basic strategies:

• compute the slice "start" value based on the length (actually even/odd-ness) of the list
• take the even indexed items and then reverse them with a separate operation

Either method will work when properly implemented. Hint: the second method may be a bit easier to do.

STAFF

Hi, Yusuf Gillani! Looks like you're doing terrific. The last part is a little tricky and your code would work in approximately half of the cases. Namely, it would work when there are an odd number off elements. The example it gives is `[1, 2, 3, 4, 5]` and expects back `[5, 3, 1]` which your code does. However, if we change that to `[1, 2, 3, 4, 5, 6]`, it gives back `[6, 4, 2]` but those are at the odd indexes.

New plan of attack: first pick every other item and then reverse it.

Hope this helps!

edited for minor correction:

In your second example you get the even numbers, but the are at the odd indexes.

Steven Parker yup woops Correcting now! (Had even numbers on the brain for obvious reasons )