[SurroundSound] Cmd window Noob

Hi there. I have a sacd iso file and I want to extract individual dsf
files from it. I'm using sacd extract. Now I'm a bit of a cmd window
noob. I'm typing the following-

sacd_extract -2 –s –c –I"filename.iso"

I get this error message-

sacd_extract.exe: invalid option -- s

Can someone tell me what I'm doing wrong?

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