It seems like you're asking about the placement of the letter "e". If you're referring to the use of the letter "e" in Roman numerals, it's not typically used at all. The basic Roman numeral system consists of the following symbols:
However, if you're asking about something else or need clarification on a different topic, please provide more details so I can give you a more accurate answer. Whether it's about English grammar, spelling rules, or another subject entirely, I'm here to help!