No more hard coding for you as there are now random tests.

Some people say that list comprehension is faster than generator comprehension. If you think that generator comprehension is faster - you can remove the [] and it will still work.

Your code has a bug. The index is zero based.

[] not need

[] not need

for list comprehension and then make list to string with "".join( [list comprehension ] )

for list comprehension and then make list to string with "".join( [list comprehension ] )

for list comprehension and then make list to string with "".join( [ list comprehension ] )

necessary when doing list comprehension

necessary when doing list comprehension

For join().

for list

In the code you have included you are printing your solution, you need to return it.