#include <iostream>

int someMethod(){
  static int a = 20;
  static int result = 21;
  std::cout << " [" << a << "] ";
  ++result;
  ++a;
  --result;
  return result;
}

int main(){
  std::cout << someMethod() << "\n";
  std::cout << someMethod() << "\n";
  std::cout << someMethod() << "\n";
}