class Foo {
  set(a, b, c, d, e) {
    __a = a
    __b = b
    __c = c
    __d = d
    __e = e
  }

  write {
    IO.print(__a)
    IO.print(__b)
    IO.print(__c)
    IO.print(__d)
    IO.print(__e)
  }
}

(new Foo).set(1, 2, 3, 4, 5)
(new Foo).write
// expect: 1
// expect: 2
// expect: 3
// expect: 4
// expect: 5