Help me in solving AO01 problem

My issue

shows wrong output even if the code is proper

My code

# Click on 'Submit' to view the results
# Click on 'Next' to proceed

sample_list = [5, 3, 2, 4, 1]

print(sample_list)          # print command for a list displays the list
print(sample_list[2])       # output specific index from the list
print(sample_list[-3])      # negative indexing of the list
print(sample_list[1:4])     # slice a list between two indices

sample_list.append(6)       # update the list by adding an element

sample_list.sort()          # sort the list in an ascending order

print(sample_list + sample_list)    # view the result of list concatenation

Learning course: Python for problem solving - 2
Problem Link: CodeChef: Practical coding for everyone

u have not written this part of code before concatenating.

print(sample_list)          # remove the item at the index 2