/******************************************************************************
Online C++ Compiler.
Code, Compile, Run and Debug C++ program online.
Write your code in this editor and press "Run" button to compile and execute it.
*******************************************************************************/
#include <iostream>
#include <regex>
int main()
{
std::cout << "Correct: " << !std::regex_match("500", std::regex("[^a-zA-Z]"));
}