let () =
  let a, b = read_line () |>
             Str.split (Str.regexp_string " " ) |>
             List.map int_of_string |>
             fun lst -> (List.nth lst 0, List.nth lst 1)
  in
  let line = (if b - a > 0 then "+" else "") ^ string_of_int (b - a) in
  print_endline line