Nothing New

#include <iostream>
#include <iomanip>
#include <string>
#include <sstream>
#include <algorithm>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include <fstream>
#include <stack>
#include <map>
#include <cstring>
#include <cmath>
#include <set>
#include <iterator>
#include <cmath>

using namespace std;

ostream & operator << (ostream & out, vector<int> const & v)
{
    for(int el: v)
        out << el << ' ';
    return out;
}

ostream & operator << (ostream & out, const pair<pair<int, int>, string> & p)
{
    out << '(' << (p.first).first << ',' << (p.first).second << ',' << p.second << ')';
    return out;
}

ostream & operator << (ostream & out, const pair<int, int> & p)
{
    out << '(' << p.first << ',' << p.second << ')';
    return out;
}

ostream & operator << (ostream & out, vector<string> const & v)
{
    for(string el: v)
        out << el;
    return out;
}

int main()
{
    vector<string> a;
    string k;
    while(getline(cin, k))
        a.push_back(k);
    sort(a.begin(),a.end(), [](string a, string b) {return a+b > b+a;});
    cout << a;
}