I want to delete 3 element and insert a element in second position, but it's not printing right

Question

https://code.sololearn.com/c09okEpRRe5c/?ref=app

Answer 1

Give me sample of input data to test the code with ...

Answer 2

Give me sample of input data to test the code with ...
Delete 3rd forth and sixt element then insert 12 at second position
Input data: 1,2,3,4,5,6,7,8,9,10