import java.util.*;
import java.util.stream.Collectors;

public class merging_lists {


    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);


            int maxSize = 0;
            int minSize = 0;
            String line1 = scanner.nextLine();
            String line2 = scanner.nextLine();


                List<Integer> numbers1 = Arrays.stream(line1.split(" ")).
                        map(Integer::parseInt).collect(Collectors.toList());

                List<Integer> numbers2 = Arrays.stream(line2.split(" ")).
                        map(Integer::parseInt).collect(Collectors.toList());


                    if(numbers1.size()>=numbers2.size()){

                        maxSize = numbers1.size();
                        minSize = numbers2.size();

                    }else{

                        maxSize = numbers2.size();
                        minSize = numbers1.size();
                    }

                    List<Integer> mergedLists = new ArrayList<>();

                    for(int i = 0; i < maxSize; i++){

                        if(i<minSize) {
                            mergedLists.add(numbers1.get(i));
                            mergedLists.add(numbers2.get(i));
                        }else{

                            if(maxSize == numbers1.size()){

                                mergedLists.add(numbers1.get(i));

                            }else if(maxSize == numbers2.size()){

                                mergedLists.add(numbers2.get(i));
                            }
                        }
                    }


                        for(int output : mergedLists){

                            System.out.print(output+" ");
                        }
    }
}