Exercise $4$: reading and writing to file

Write a program that reads the content of the file "database.txt$"$ and replaces all instances of the word "morning" with "evening" $($all lower case$).$ The updated content should be written to a new file called "new$-$database.txt$".$

Just like assignment $3,$ the word needs to be "morning" by itself. If it is a part of another word such as "morningside" then it shouldn't be replaced.

For example, if "database.txt$"$ contains the following content:

Good morning to you!

Good morning to you, residents of morningside!

Then after running the program, "new$-$database.txt$"$ should have the following content:

Good evening to you!

Good evening to you, residents of morningside!

For simplicity, you can use $.$split$()$ and not worry about punctuations touching the word "morning" such as "morning!"