x= ["a", 2, 3, 1, False, [1, 2, 3]]     // Pop 1 from the 4th index to 0th index //

# Your code goes below here

y = messy_list.pop(3)                   // Pop index number 4 //
messy_list.insert(0, y)                 // Insert it back to index number one //

Create pop_insert.py