public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int cases = sc . nextInt ( ) ;
  while ( cases > 0 ) {
    int n = sc . nextInt ( ) ;
    sc . nextLine ( ) ;
    String input = sc . nextLine ( ) ;
    boolean flag = true ;
    for ( int i = 0 ;
    i < n / 2 ;
    i ++ ) {
      int first = input . charAt ( i ) ;
      int last = input . charAt ( n - 1 - i ) ;
      if ( first == last ) {
        continue ;
      }
      else if ( Math . abs ( first - last ) == 1 ) {
        flag = false ;
        break ;
      }
      else if ( Math . abs ( first - last ) == 2 ) {
        continue ;
      }
      else {
        flag = false ;
        break ;
      }
    }
    if ( flag ) {
      System . out . println ( "YES" ) ;
    }
    else {
      System . out . println ( "NO" ) ;
    }
    cases -- ;
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int cases = sc . nextInt ( ) ; while ( cases > 0 ) { int n = sc . nextInt ( ) ; sc . nextLine ( ) ; String input = sc . nextLine ( ) ; boolean flag = true ; for ( int i = 0 ; i < n / 2 ; i ++ ) { int first = input . charAt ( i ) ; int last = input . charAt ( n - 1 - i ) ; if ( first == last ) { continue ; } else if ( Math . abs ( first - last ) == 1 ) { flag = false ; break ; } else if ( Math . abs ( first - last ) == 2 ) { continue ; } else { flag = false ; break ; } } if ( flag ) { System . out . println ( " YES " ) ; } else { System . out . println ( " NO " ) ; } cases -- ; } }
(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: (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: (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)))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (true))) (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 (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (identifier)))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (continue_statement)) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)))) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (false))) (break_statement)) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)))) right: (decimal_integer_literal))) consequence: (block (continue_statement)) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (false))) (break_statement))))))) (if_statement condition: (parenthesized_expression (identifier)) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (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)))))) (expression_statement (update_expression (identifier)))))))