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In python collections course I am stuck with the following task:

Challenge Task 2 of 4: Make a new function named first_and_last_4. It'll accept a single iterable but, this time, it'll return the first four and last four items as a single value.

My solution gets a 'bummer' for the following solution: If item2 = 'kukeleegu' then my solution gives 'kukeugee' and if item2 = [1,2,3,4,5,6,7,8,9] then 12349876. I believe that these are correct answers and solution should be bassed but I will get a 'bummer', why ? Can anyone help me with that ?

def first_and_last_4(item2):
uus=[]
for i in item2:
character=str(i)
uus.append(character)
string1 = ''.join(uus)
return string1[0:4:1]+string1[-1:-5:-1]