First refer to:
Mu: /s？ wd=%E6%B2%90
Wei: /view/ 1854087.htm
Mu means more than Wei, but it is also possible that you just like an explanation of Wei.
It depends on whether you remember a boy or a girl.
And whether it is easy for people to call it out (Mu knows many people) or easy for people to remember (ⅷ will be remembered once he admits his mistake).
Some people can count birthdays, hahahaha.