public static void main ( String [ ] args ) {
  Scanner input = new Scanner ( System . in ) ;
  int t = input . nextInt ( ) ;
  while ( t -- > 0 ) {
    int n = input . nextInt ( ) ;
    char [ ] s = input . next ( ) . toCharArray ( ) ;
    int l = ( ( n & 1 ) == 1 ) ? n / 2 : n / 2 - 1 ;
    int r = n / 2 ;
    boolean res = true ;
    while ( l >= 0 ) {
      int temp = Math . abs ( ( int ) s [ l ] - ( int ) s [ r ] ) ;
      if ( temp != 2 && temp != 0 ) {
        res = false ;
        break ;
      }
      l -- ;
      r ++ ;
    }
    System . out . println ( res ? "YES" : "NO" ) ;
  }
}

public static void main ( String [ ] args ) { Scanner input = new Scanner ( System . in ) ; int t = input . nextInt ( ) ; while ( t -- > 0 ) { int n = input . nextInt ( ) ; char [ ] s = input . next ( ) . toCharArray ( ) ; int l = ( ( n & 1 ) == 1 ) ? n / 2 : n / 2 - 1 ; int r = n / 2 ; boolean res = true ; while ( l >= 0 ) { int temp = Math . abs ( ( int ) s [ l ] - ( int ) s [ r ] ) ; if ( temp != 2 && temp != 0 ) { res = false ; break ; } l -- ; r ++ ; } System . out . println ( res ? " YES " : " NO " ) ; } }
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