public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  int sx = scanner . nextInt ( ) ;
  int sy = scanner . nextInt ( ) ;
  int tx = scanner . nextInt ( ) ;
  int ty = scanner . nextInt ( ) ;
  int x = ( ( tx - sx ) >> 31 ) | 1 ;
  int y = ( ( ty - sy ) >> 31 ) | 1 ;
  int nx = ( tx - sx ) * x ;
  int ny = ( ty - sy ) * y ;
  StringBuilder sb = new StringBuilder ( ) ;
  for ( int i = 0 ;
  i < ny ;
  i ++ ) sb . append ( y > 0 ? 'U' : 'D' ) ;
  y *= - 1 ;
  for ( int i = 0 ;
  i < nx + 1 ;
  i ++ ) sb . append ( x > 0 ? 'R' : 'L' ) ;
  x *= - 1 ;
  for ( int i = 0 ;
  i < ny + 1 ;
  i ++ ) sb . append ( y > 0 ? 'U' : 'D' ) ;
  y *= - 1 ;
  for ( int i = 0 ;
  i < nx + 1 ;
  i ++ ) sb . append ( x > 0 ? 'R' : 'L' ) ;
  sb . append ( y > 0 ? 'U' : 'D' ) ;
  sb . append ( x > 0 ? 'R' : 'L' ) ;
  x *= - 1 ;
  for ( int i = 0 ;
  i < ny + 1 ;
  i ++ ) sb . append ( y > 0 ? 'U' : 'D' ) ;
  y *= - 1 ;
  for ( int i = 0 ;
  i < nx + 1 ;
  i ++ ) sb . append ( x > 0 ? 'R' : 'L' ) ;
  x *= - 1 ;
  for ( int i = 0 ;
  i < ny + 1 ;
  i ++ ) sb . append ( y > 0 ? 'U' : 'D' ) ;
  for ( int i = 0 ;
  i < nx ;
  i ++ ) sb . append ( x > 0 ? 'R' : 'L' ) ;
  System . out . println ( sb . toString ( ) ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; int sx = scanner . nextInt ( ) ; int sy = scanner . nextInt ( ) ; int tx = scanner . nextInt ( ) ; int ty = scanner . nextInt ( ) ; int x = ( ( tx - sx ) >> 31 ) | 1 ; int y = ( ( ty - sy ) >> 31 ) | 1 ; int nx = ( tx - sx ) * x ; int ny = ( ty - sy ) * y ; StringBuilder sb = new StringBuilder ( ) ; for ( int i = 0 ; i < ny ; i ++ ) sb . append ( y > 0 ? ' U ' : ' D ' ) ; y *= - 1 ; for ( int i = 0 ; i < nx + 1 ; i ++ ) sb . append ( x > 0 ? ' R ' : ' L ' ) ; x *= - 1 ; for ( int i = 0 ; i < ny + 1 ; i ++ ) sb . append ( y > 0 ? ' U ' : ' D ' ) ; y *= - 1 ; for ( int i = 0 ; i < nx + 1 ; i ++ ) sb . append ( x > 0 ? ' R ' : ' L ' ) ; sb . append ( y > 0 ? ' U ' : ' D ' ) ; sb . append ( x > 0 ? ' R ' : ' L ' ) ; x *= - 1 ; for ( int i = 0 ; i < ny + 1 ; i ++ ) sb . append ( y > 0 ? ' U ' : ' D ' ) ; y *= - 1 ; for ( int i = 0 ; i < nx + 1 ; i ++ ) sb . append ( x > 0 ? ' R ' : ' L ' ) ; x *= - 1 ; for ( int i = 0 ; i < ny + 1 ; i ++ ) sb . append ( y > 0 ? ' U ' : ' D ' ) ; for ( int i = 0 ; i < nx ; i ++ ) sb . append ( x > 0 ? ' R ' : ' L ' ) ; System . out . println ( sb . toString ( ) ) ; }
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