text: #include <vector>
  #include <iostream>
  #include<string>
  
  using std::vector;
  
  int main()
  {
      vector<int> letters;
      
      letters.push_back(1);
      letters.push_back(2);
      letters.push_back(3);
  
      for(auto l: letters)
      {
          std::cout<<l<<"\n";
      }
  
      vector<std::string> names {"mary", "joe", "jack"};
  
      for(auto name: names)
      {
          std::cout<<name<<"\n";
      }
  
      vector<int> numbers (10, 5);
  
      for(auto number: numbers)
      {
          std::cout<<number<<"\n";
      }
  
      return 0;
  }