public static void main ( String [ ] args ) {
  try {
    FastReader s = new FastReader ( ) ;
    int T = s . nextInt ( ) ;
    while ( T > 0 ) {
      int N = s . nextInt ( ) ;
      System . out . println ( N ) ;
      for ( int i = 1 ;
      i <= N ;
      i ++ ) {
        System . out . print ( i + " " ) ;
      }
      System . out . println ( ) ;
      T -- ;
    }
  }
  catch ( Exception e ) {
    return ;
  }
}

public static void main ( String [ ] args ) { try { FastReader s = new FastReader ( ) ; int T = s . nextInt ( ) ; while ( T > 0 ) { int N = s . nextInt ( ) ; System . out . println ( N ) ; for ( int i = 1 ; i <= N ; i ++ ) { System . out . print ( i + " ▁ " ) ; } System . out . println ( ) ; T -- ; } } catch ( Exception e ) { return ; } }
(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 (try_statement body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier)))) (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: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (string_literal))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list))) (expression_statement (update_expression (identifier)))))) (catch_clause (catch_formal_parameter (catch_type (type_identifier)) name: (identifier)) body: (block (return_statement))))))