public static void main ( String [ ] args ) {
  Scanner in = new Scanner ( System . in ) ;
  int n = in . nextInt ( ) , k = in . nextInt ( ) , i , a [ ] [ ] = new int [ n ] [ 2 ] , c = 0 , d = 0 ;
  String s = "" ;
  for ( i = 0 ;
  i < n ;
  i ++ ) {
    a [ i ] [ 0 ] = in . nextInt ( ) ;
    a [ i ] [ 1 ] = i + 1 ;
  }
  in . close ( ) ;
  Arrays . sort ( a , ( x , y ) -> Integer . compare ( x [ 0 ] , y [ 0 ] ) ) ;
  for ( i = 0 ;
  i < n ;
  i ++ ) {
    if ( c + a [ i ] [ 0 ] <= k ) {
      c += a [ i ] [ 0 ] ;
      d ++ ;
      s += a [ i ] [ 1 ] + " " ;
    }
  }
  System . out . println ( d + "\n" + s ) ;
}

public static void main ( String [ ] args ) { Scanner in = new Scanner ( System . in ) ; int n = in . nextInt ( ) , k = in . nextInt ( ) , i , a [ ] [ ] = new int [ n ] [ 2 ] , c = 0 , d = 0 ; String s = " " ; for ( i = 0 ; i < n ; i ++ ) { a [ i ] [ 0 ] = in . nextInt ( ) ; a [ i ] [ 1 ] = i + 1 ; } in . close ( ) ; Arrays . sort ( a , ( x , y ) -> Integer . compare ( x [ 0 ] , y [ 0 ] ) ) ; for ( i = 0 ; i < n ; i ++ ) { if ( c + a [ i ] [ 0 ] <= k ) { c += a [ i ] [ 0 ] ; d ++ ; s += a [ i ] [ 1 ] + " ▁ " ; } } System . out . println ( d + " \n " + s ) ; }
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