P@55w0rd!
Is an awful password, yet meets many security policies
P@ssword2, P@ssword3, P@ssword4 etc
Also meet them, and rotate just fine.
Meanwhile
dadbffc67f798e8e0b7441fb995aeabe
Is perfectly fine, but often is not allowed
Nor is "correct horse battery staple". For wanting symbols, so many password systems really hate spaces.
Don't worry, the first 10 letters are randomly generated a-z or a-z0-9.