public static void main ( String [ ] args ) {
  int sx = scanner . nextInt ( ) , sy = scanner . nextInt ( ) , tx = scanner . nextInt ( ) , ty = scanner . nextInt ( ) , dx = tx - sx , dy = ty - sy ;
  for ( int i = 0 ;
  i < dy ;
  i ++ ) System . out . print ( 'U' ) ;
  for ( int i = 0 ;
  i < dx ;
  i ++ ) System . out . print ( 'R' ) ;
  for ( int i = 0 ;
  i < dy ;
  i ++ ) System . out . print ( 'D' ) ;
  for ( int i = 0 ;
  i <= dx ;
  i ++ ) System . out . print ( 'L' ) ;
  for ( int i = 0 ;
  i <= dy ;
  i ++ ) System . out . print ( 'U' ) ;
  for ( int i = 0 ;
  i <= dx ;
  i ++ ) System . out . print ( 'R' ) ;
  System . out . print ( "DR" ) ;
  for ( int i = 0 ;
  i <= dy ;
  i ++ ) System . out . print ( 'D' ) ;
  for ( int i = 0 ;
  i <= dx ;
  i ++ ) System . out . print ( 'L' ) ;
  System . out . print ( 'U' ) ;
}

public static void main ( String [ ] args ) { int sx = scanner . nextInt ( ) , sy = scanner . nextInt ( ) , tx = scanner . nextInt ( ) , ty = scanner . nextInt ( ) , dx = tx - sx , dy = ty - sy ; for ( int i = 0 ; i < dy ; i ++ ) System . out . print ( ' U ' ) ; for ( int i = 0 ; i < dx ; i ++ ) System . out . print ( ' R ' ) ; for ( int i = 0 ; i < dy ; i ++ ) System . out . print ( ' D ' ) ; for ( int i = 0 ; i <= dx ; i ++ ) System . out . print ( ' L ' ) ; for ( int i = 0 ; i <= dy ; i ++ ) System . out . print ( ' U ' ) ; for ( int i = 0 ; i <= dx ; i ++ ) System . out . print ( ' R ' ) ; System . out . print ( " DR " ) ; for ( int i = 0 ; i <= dy ; i ++ ) System . out . print ( ' D ' ) ; for ( int i = 0 ; i <= dx ; i ++ ) System . out . print ( ' L ' ) ; System . out . print ( ' U ' ) ; }
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(for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (character_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: (identifier)) update: (update_expression (identifier)) body: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (character_literal))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (character_literal))))))