#include <iostream>
#include <vector>
#include <set>

using namespace std;

template<typename type>
void Print(ostream& out, const type& kunteynir){
    bool first_ap = true;
    
    for(const auto& kun: kunteynir){
        if(!first_ap){
            out << ", ";
        }
        first_ap = false;
        out << kun;   
    }
}

template<typename type>
ostream& operator<< (ostream& out, const set<type>kunteynir){
    Print(out, kunteynir);
    return out;
} 

template<typename type>
ostream& operator<< (ostream& out, const vector<type>kunteynir){
    Print(out, kunteynir);
    return out;
} 

int main() {
    const vector<int> ages = {10, 5, 2, 12};
    const set<int> set_ages = {20, 15, 3 , 1};
    cout << ages << endl;
    cout << set_ages << endl;
    return 0;
}