public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  String [ ] nk = scanner . nextLine ( ) . split ( " " , 2 ) ;
  int n = Integer . parseInt ( nk [ 0 ] ) ;
  int k = Integer . parseInt ( nk [ 1 ] ) ;
  String s = scanner . nextLine ( ) ;
  char [ ] orig = s . toCharArray ( ) ;
  char [ ] chars = s . toCharArray ( ) ;
  if ( k == chars . length ) {
    Arrays . sort ( chars ) ;
    System . out . println ( new String ( chars ) ) ;
    return ;
  }
  for ( int i = 0 ;
  i < chars . length ;
  i ++ ) {
    int minI = i ;
    for ( int j = i + 1 ;
    j < chars . length ;
    j ++ ) {
      if ( chars [ minI ] > chars [ j ] ) {
        char tmp = chars [ i ] ;
        chars [ i ] = chars [ j ] ;
        chars [ j ] = tmp ;
        int count = replaceCount ( orig , chars ) ;
        if ( count <= k ) {
          minI = j ;
        }
        tmp = chars [ i ] ;
        chars [ i ] = chars [ j ] ;
        chars [ j ] = tmp ;
      }
    }
    if ( i != minI ) {
      char tmp = chars [ i ] ;
      chars [ i ] = chars [ minI ] ;
      chars [ minI ] = tmp ;
    }
  }
  System . out . println ( new String ( chars ) ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; String [ ] nk = scanner . nextLine ( ) . split ( " ▁ " , 2 ) ; int n = Integer . parseInt ( nk [ 0 ] ) ; int k = Integer . parseInt ( nk [ 1 ] ) ; String s = scanner . nextLine ( ) ; char [ ] orig = s . toCharArray ( ) ; char [ ] chars = s . toCharArray ( ) ; if ( k == chars . length ) { Arrays . sort ( chars ) ; System . out . println ( new String ( chars ) ) ; return ; } for ( int i = 0 ; i < chars . length ; i ++ ) { int minI = i ; for ( int j = i + 1 ; j < chars . length ; j ++ ) { if ( chars [ minI ] > chars [ j ] ) { char tmp = chars [ i ] ; chars [ i ] = chars [ j ] ; chars [ j ] = tmp ; int count = replaceCount ( orig , chars ) ; if ( count <= k ) { minI = j ; } tmp = chars [ i ] ; chars [ i ] = chars [ j ] ; chars [ j ] = tmp ; } } if ( i != minI ) { char tmp = chars [ i ] ; chars [ i ] = chars [ minI ] ; chars [ minI ] = tmp ; } } System . out . println ( new String ( chars ) ) ; }
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(identifier) arguments: (argument_list (array_access array: (identifier) index: (decimal_integer_literal)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (decimal_integer_literal)))))) (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: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (field_access object: (identifier) field: (identifier)))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (identifier)))))) (return_statement))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (field_access object: (identifier) field: (identifier))) update: (update_expression (identifier)) body: (block (local_variable_declaration type: 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(identifier)))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (object_creation_expression type: (type_identifier) arguments: (argument_list (identifier))))))))