# What's the simplest way to solve this using insert and pop method?

lists.py
```messy_list = ["a", 2, 3, 1, False, [1, 2, 3]]

# Your code goes below here

messy_list.insert(0, messy_list.pop(3))
messy_list.remove(str("a"))
messy_list.remove(False)
```

It keep saying I can't just simply add the 1, but I have to move the one to the front of the list.

typo *messy_list.insert(0, 1)

Hi Ruddy, I think you use the simplest way to solve this challenge already . But you forget to remove the list inside the list ... This one should work:

```messy_list.remove("a")
messy_list.remove(False)
messy_list.remove([1, 2, 3])
```

Another way would be to use a for loop that checks the type of every list item and removes it if it is not an integer. The code could look like this:

```# use [:] to create a copy of the list to be able to modify and iterate simultaneously
# otherwise you will delete an item and mess with up the iteration
# use type method, because otherwise you will compare a reference to a item and not item itself
for item in messy_list[:]:
if type(item) != int:
messy_list.remove(item)
```

Does it make sense?

It does make sense, what doesn't make sense is that it keeps returning >>>"You need to move the `1` to the front of the list."

The challenge is:

Alright, my list is messy! Help me clean it up!

First, start by moving the 1 from index 3 to index 0. Try to do this in a single step by using both .pop() and .insert(). It's OK if it takes you more than one step, though!

Hey, I think the challenge interpreter is going kind of insane. I had the same error message. I solved it by reloading the page. And be careful. You donĀ“t need the str() method in the first remove statement. And don't forget to remove the list.

I was looking for this. I was trying to use `messy_list.copy()` instead of `messy_list[:]` BUT we haven't learned about slices yet ;)

That's odd, for some reason I still cannot get it to work even after refreshing the page multiple times. Does anyone have any idea why this doesn't work? Maybe the interpreter is looking for a specific way of coding this problem.

This post helped out, I finally found the answer. It was a lot more straight forward than I thought.

https://teamtreehouse.com/community/syntaxerror-for-letter-in-messylist

Thanks for helping Grigorij!