let () =
  let a, b = Scanf.scanf "%s %s " (fun a b -> a, b) in
  if a = "0" && b = "0" || a = "2" && b = "2" then print_endline "E"
  else if a = "0" || a = "1" || b = "0" || b = "1" then print_endline  "S"
  else print_endline "P"