#include <iostream>
#include <cstdlib>      /* printf, scanf, puts, NULL */
#include <ctime>       /* time */
#include <list>

using namespace std;

int randomNumber;

list <int> listemx;
list <int> listemy;

int i;

int main() {
    
    srand(time(NULL));
    for(i=0; i<20; i++){
        randomNumber = rand() % 20;
        listemx.push_front(randomNumber + 5); 
    }
    

    listemx.sort(); 
    
        for(i=0; i<20; i++){
        randomNumber = rand() % 20;
        listemy.push_front(randomNumber + 5); 
    }
    
    listemy.sort(); 

    listemx.merge(listemy);
    
    
    for(int number : listemx) {
        cout << number <<", ";
    }

    return 0;
}