How to append at a specific position

[Carson147]

This is a little hard to explain but if the code is ran things will start to make sense.

Right now when this program is ran it does this, when I enter a letter in the input that is part of line 1
['*', '*', '*', '*', '*', 'l']

My goal is to have it do this instead
['*', 'l', '*', '*', '*',]

line1 = 'alpha'
line2 = ['*', '*', '*', '*', '*',]
password = input('enter a letter in the password')

for i in line1:
    if i == password:
        line2.append(password)
        print(line2)

Does anyone know the solution?