it's better to look at what the eight characters and five elements are missing before choosing a safe name. For example, if there is no line that lacks fire, take a word next to the word fire, such as "can", and if the five elements lack wood, take the name next to the word wood, such as "nan", and so on. If it is water shortage, this word can be used, and then look at the literal meaning, which indicates that you like it again.
I hope what I said can help you.