object Main extends App {
  val Array(sx, sy, tx, ty) = scala.io.StdIn.readLine.split(' ').map(_.toInt)
  val tate = ty - sy
  val yoko = tx - sx
  val path1 = "U" * tate + "R" * yoko
  val path2 = "D" * tate + "L" * yoko
  val path3 = "D" + "R" * (yoko + 1) + "U" * (tate + 1) + "L"
  val path4 = "U" + "L" * (yoko + 1) + "D" * (tate + 1) + "R"

  println(Array(path1, path2, path3, path4).mkString)
}
