#include <iostream>
#include <vector>
#include <string>
#include <sstream>
using namespace std;
 
int main()
{
	string command, intermediate,temp; 
    getline (cin,command);
    vector <string> tokens;
    stringstream check(command);
    string middle;
    while(getline(check, intermediate, ','))
    {
        tokens.push_back(intermediate);
    }
 
    for(int i = 0; i<tokens.size(); i++)
    {
        cout << tokens[i] <<endl;
 
    }
    cout << tokens.size() << " elements:"<<endl;
    if (tokens.size()>1)
        temp = tokens[1];
    else temp = "Second element not found";
    cout<<temp<<endl; 
 
    string tmp; 
    for (auto const& x:tokens)
        tmp += x+" ";
    cout << tmp<<endl; 
    return 0;    
}

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aGVsbG8sd29ybGQsIHdoYXQncyBuZXc/

hello,world, what's new?