public static void main ( String [ ] args ) {
  Scanner scn = new Scanner ( System . in ) ;
  String num = scn . nextLine ( ) ;
  String num2 = scn . nextLine ( ) ;
  String str = "" ;
  for ( int i = 0 ;
  i < num . length ( ) ;
  i ++ ) {
    if ( num . charAt ( i ) == num2 . charAt ( i ) ) {
      str = str + 0 ;
    }
    else {
      str = str + 1 ;
    }
  }
  System . out . print ( str ) ;
}

public static void main ( String [ ] args ) { Scanner scn = new Scanner ( System . in ) ; String num = scn . nextLine ( ) ; String num2 = scn . nextLine ( ) ; String str = " " ; for ( int i = 0 ; i < num . length ( ) ; i ++ ) { if ( num . charAt ( i ) == num2 . charAt ( i ) ) { str = str + 0 ; } else { str = str + 1 ; } } System . out . print ( str ) ; }
(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: (type_identifier) declarator: (variable_declarator name: (identifier) value: (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: (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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))