text: #include <iostream>
  #include "solution.hpp"
  
  void run_example(){
      Solution s;
      string str;
  
      str = "3[a]2[bc]";
      std::cout << s.decodeString(str) << std::endl;
  
      str = "3[a2[c]]";
      std::cout << s.decodeString(str) << std::endl;
  
      str = "2[abc]3[cd]ef";
      std::cout << s.decodeString(str) << std::endl;
  }
  