public static void main ( String args [ ] ) {
  Scanner in = new Scanner ( System . in ) ;
  String input = in . nextLine ( ) ;
  int arr [ ] = new int [ 10 ] ;
  for ( int i = 0 ;
  i < input . length ( ) ;
  i ++ ) {
    int index = input . charAt ( i ) - 48 ;
    arr [ index ] ++ ;
    i ++ ;
  }
  String output = "" ;
  for ( int i = 0 ;
  i < arr . length ;
  i ++ ) {
    if ( arr [ i ] > 0 ) {
      while ( arr [ i ] != 0 ) {
        String si = String . valueOf ( i ) ;
        if ( output . isEmpty ( ) ) output += si ;
        else output += "+" + si ;
        arr [ i ] -- ;
      }
    }
  }
  System . out . print ( output ) ;
}

public static void main ( String args [ ] ) { Scanner in = new Scanner ( System . in ) ; String input = in . nextLine ( ) ; int arr [ ] = new int [ 10 ] ; for ( int i = 0 ; i < input . length ( ) ; i ++ ) { int index = input . charAt ( i ) - 48 ; arr [ index ] ++ ; i ++ ; } String output = " " ; for ( int i = 0 ; i < arr . length ; i ++ ) { if ( arr [ i ] > 0 ) { while ( arr [ i ] != 0 ) { String si = String . valueOf ( i ) ; if ( output . isEmpty ( ) ) output += si ; else output += " + " + si ; arr [ i ] -- ; } } } System . out . print ( output ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) 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: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) dimensions: (dimensions) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (decimal_integer_literal))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (decimal_integer_literal)))) (expression_statement (update_expression (array_access array: (identifier) index: (identifier)))) (expression_statement (update_expression (identifier))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (string_literal))) (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 (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (block (while_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) consequence: (expression_statement (assignment_expression left: (identifier) right: (identifier))) alternative: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (string_literal) right: (identifier))))) (expression_statement (update_expression (array_access array: (identifier) index: (identifier)))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))