public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  BigInteger l = sc . nextBigInteger ( ) ;
  BigInteger r = sc . nextBigInteger ( ) ;
  if ( ( r . add ( l ) . add ( new BigInteger ( "1" ) ) ) . mod ( new BigInteger ( "2" ) ) . equals ( new BigInteger ( "0" ) ) ) {
    System . out . println ( "YES" ) ;
    for ( BigInteger i = l ;
    i . compareTo ( r . add ( new BigInteger ( "1" ) ) ) < 0 ;
    i = i . add ( new BigInteger ( "2" ) ) ) {
      System . out . println ( i + " " + i . add ( new BigInteger ( "1" ) ) ) ;
    }
  }
  else {
    System . out . println ( "NO" ) ;
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; BigInteger l = sc . nextBigInteger ( ) ; BigInteger r = sc . nextBigInteger ( ) ; if ( ( r . add ( l ) . add ( new BigInteger ( "1" ) ) ) . mod ( new BigInteger ( "2" ) ) . equals ( new BigInteger ( "0" ) ) ) { System . out . println ( " YES " ) ; for ( BigInteger i = l ; i . compareTo ( r . add ( new BigInteger ( "1" ) ) ) < 0 ; i = i . add ( new BigInteger ( "2" ) ) ) { System . out . println ( i + " ▁ " + i . add ( new BigInteger ( "1" ) ) ) ; } } else { System . out . println ( " NO " ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (method_invocation object: (method_invocation object: (parenthesized_expression (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) name: (identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (string_literal)))))) name: (identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (string_literal))))) name: (identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (string_literal)))))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (for_statement init: (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (identifier))) condition: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (string_literal))))))) right: (decimal_integer_literal)) update: (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (string_literal)))))) body: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (string_literal)))))))))))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))))))