public static void main ( String [ ] args ) throws Exception {
  Scanner sc = new Scanner ( System . in ) ;
  int sx = sc . nextInt ( ) ;
  int sy = sc . nextInt ( ) ;
  int tx = sc . nextInt ( ) ;
  int ty = sc . nextInt ( ) ;
  int gapx = tx - sx ;
  int gapy = ty - sy ;
  ArrayList < Character > list = new ArrayList < Character > ( ) ;
  for ( int i = 0 ;
  i < gapy ;
  i ++ ) {
    list . add ( 'U' ) ;
  }
  for ( int i = 0 ;
  i < gapx ;
  i ++ ) {
    list . add ( 'R' ) ;
  }
  for ( int i = 0 ;
  i < gapy ;
  i ++ ) {
    list . add ( 'D' ) ;
  }
  for ( int i = 0 ;
  i < gapx ;
  i ++ ) {
    list . add ( 'L' ) ;
  }
  list . add ( 'L' ) ;
  for ( int i = 0 ;
  i < gapy + 1 ;
  i ++ ) {
    list . add ( 'U' ) ;
  }
  for ( int i = 0 ;
  i < gapx + 1 ;
  i ++ ) {
    list . add ( 'R' ) ;
  }
  list . add ( 'D' ) ;
  list . add ( 'R' ) ;
  for ( int i = 0 ;
  i < gapy + 1 ;
  i ++ ) {
    list . add ( 'D' ) ;
  }
  for ( int i = 0 ;
  i < gapx + 1 ;
  i ++ ) {
    list . add ( 'L' ) ;
  }
  list . add ( 'U' ) ;
  for ( Character route : list ) {
    System . out . print ( route ) ;
  }
}

public static void main ( String [ ] args ) throws Exception { Scanner sc = new Scanner ( System . in ) ; int sx = sc . nextInt ( ) ; int sy = sc . nextInt ( ) ; int tx = sc . nextInt ( ) ; int ty = sc . nextInt ( ) ; int gapx = tx - sx ; int gapy = ty - sy ; ArrayList < Character > list = new ArrayList < Character > ( ) ; for ( int i = 0 ; i < gapy ; i ++ ) { list . add ( ' U ' ) ; } for ( int i = 0 ; i < gapx ; i ++ ) { list . add ( ' R ' ) ; } for ( int i = 0 ; i < gapy ; i ++ ) { list . add ( ' D ' ) ; } for ( int i = 0 ; i < gapx ; i ++ ) { list . add ( ' L ' ) ; } list . add ( ' L ' ) ; for ( int i = 0 ; i < gapy + 1 ; i ++ ) { list . add ( ' U ' ) ; } for ( int i = 0 ; i < gapx + 1 ; i ++ ) { list . add ( ' R ' ) ; } list . add ( ' D ' ) ; list . add ( ' R ' ) ; for ( int i = 0 ; i < gapy + 1 ; i ++ ) { list . add ( ' D ' ) ; } for ( int i = 0 ; i < gapx + 1 ; i ++ ) { list . add ( ' L ' ) ; } list . add ( ' U ' ) ; for ( Character route : list ) { System . out . print ( route ) ; } }
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