Is it possible to somehow simplify the regular expression of the form YayoYo]|.{0})$?

Question

Regular Expressions

I wrote a regular expression, it works, but it looks
ugly ЯА-ЯёЁ]|.{0})$
The task is as follows: in the string you need to find a correspondence between IP or MCU, so that
1. If there are other Russian letters before MCU|IP, then there must be a space before MCU|IP
2. If after MKU|IP there are other Russian letters, then after MKU|IP there must be a space
3. The line can be a simple "MKU" or "IP" 4. MKU
|IP can be at the beginning or end of the line
quotes or other non-Russian characters
Examples with IP
1. true: "Sasha IP" false: "SashaIP"
2. true: "IP Sasha" false: "IPSasha"
3. true: "IP"
4. true: "Sasha Ivanov IP" false: "Sasha Ivanov IP"
5. true: "IP'Sasha'"
5. true: "@[email protected]"

Answer 1

As a result of the nationwide assistance, this came out =
)

Answer 2

(^|\s)(МКУ|ИП)($|\s)
So:
IP Sasha - true
IPSasha - false
MKU Sasha - true
MKUSasha - false This is MKU Sasha
- false
This is MKU Sasha - true
Did I understand the task correctly?

Answer 3

The first law of programming:
1. If something works, don't touch it.
Give examples of strings by your numbers. This will make it easier to understand the problem.
1....
2...
...
5...