French DJS: conflicting rules re. ‘right’ and ‘left’ S’s

Hello,

I want to write J’espère in French DJS and I don’t know how to write my S because my textbook says:

-after J’s and CH’s : ‘right’ S (i.e. the one oriented like a comma)

-before P and B : left S

And I don’t recall encountering this word (yet) in the training material within the textbook. Does anyone know which of the two rules takes precedence?

 

Thanks!