static String readln ( ) throws IOException {
  String line = input . readLine ( ) ;
  return line ;
}

static String readln ( ) throws IOException { String line = input . readLine ( ) ; return line ; }
(method_declaration (modifiers) type: (type_identifier) name: (identifier) parameters: (formal_parameters) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (return_statement (identifier))))