Confusion about rndstr.in

Dear atat users,
I am trying to generate a SQS of a quinary alloy using mcsqs code and I`m confused about "rndstr.in" file. How can I obtain the coordinates of each sites in "rndstr.in" file? Are they user specified or generated by some other codes?

Thank u.

Thank u very much, tsia.

You need to prepare it by yourself according to the randomly disordered structure that you want to study.