public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int sx = sc . nextInt ( ) ;
  int sy = sc . nextInt ( ) ;
  int tx = sc . nextInt ( ) ;
  int ty = sc . nextInt ( ) ;
  int xd = tx - sx ;
  int yd = ty - sy ;
  for ( int y = 0 ;
  y < yd ;
  y ++ ) {
    out . print ( "U" ) ;
  }
  for ( int x = 0 ;
  x < xd ;
  x ++ ) {
    out . print ( "R" ) ;
  }
  for ( int y = 0 ;
  y < yd ;
  y ++ ) {
    out . print ( "D" ) ;
  }
  for ( int x = 0 ;
  x < xd ;
  x ++ ) {
    out . print ( "L" ) ;
  }
  out . print ( "L" ) ;
  for ( int y = 0 ;
  y < yd + 1 ;
  y ++ ) {
    out . print ( "U" ) ;
  }
  for ( int x = 0 ;
  x < xd + 1 ;
  x ++ ) {
    out . print ( "R" ) ;
  }
  out . print ( "D" ) ;
  out . print ( "R" ) ;
  for ( int y = 0 ;
  y < yd + 1 ;
  y ++ ) {
    out . print ( "D" ) ;
  }
  for ( int x = 0 ;
  x < xd + 1 ;
  x ++ ) {
    out . print ( "L" ) ;
  }
  out . print ( "U" ) ;
  out . println ( ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int sx = sc . nextInt ( ) ; int sy = sc . nextInt ( ) ; int tx = sc . nextInt ( ) ; int ty = sc . nextInt ( ) ; int xd = tx - sx ; int yd = ty - sy ; for ( int y = 0 ; y < yd ; y ++ ) { out . print ( " U " ) ; } for ( int x = 0 ; x < xd ; x ++ ) { out . print ( " R " ) ; } for ( int y = 0 ; y < yd ; y ++ ) { out . print ( " D " ) ; } for ( int x = 0 ; x < xd ; x ++ ) { out . print ( " L " ) ; } out . print ( " L " ) ; for ( int y = 0 ; y < yd + 1 ; y ++ ) { out . print ( " U " ) ; } for ( int x = 0 ; x < xd + 1 ; x ++ ) { out . print ( " R " ) ; } out . print ( " D " ) ; out . print ( " R " ) ; for ( int y = 0 ; y < yd + 1 ; y ++ ) { out . print ( " D " ) ; } for ( int x = 0 ; x < xd + 1 ; x ++ ) { out . print ( " L " ) ; } out . print ( " U " ) ; out . println ( ) ; }
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value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) update: (update_expression (identifier)) body: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (string_literal)))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (string_literal)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) update: (update_expression (identifier)) body: (block (expression_statement (method_invocation object: 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