Need help in javascript

Question

So I have the code below.
I am struggling on how to change "_" to letter when the user chose a right letter, and write it into the "word" paragraph ( inside its certain span)
Sorry, Idk how to explain it. 😅
(I have the tryIt() where I want to make everything happen when user enter correct letter)

Help me pls. 🙏🙏🙏

https://code.sololearn.com/WPBLpTQ9I6H7/?ref=app

Answer 1

https://code.sololearn.com/WaCQ7ny7V2ty/?ref=app

Answer 2

https://code.sololearn.com/WyNYACuEEuzS/?ref=app
https://code.sololearn.com/W7lJhBrIwPdI/?ref=app

You can see this code then you got some thing 😊😊