#include <string>
#include <iostream>

int main()
{
    {
        std::string a = "Start";
        std::string b = a + " End";
        
        std::cout << "1: " << b << std::endl;
    }
    
    {
        const std::string a = "Start";
        std::string b = a + " End";
        
        std::cout << "2: " << b << std::endl;
    }
    
    {
        std::string a = " End";
        std::string b = "Start" + a;
        
        std::cout << "3: " << b << std::endl;
    }
    
    {
        const std::string a = " End";
        std::string b = "Start" + a;
        
        std::cout << "4: " << b << std::endl;
    }
}