import java.io.*;
import java.util.ArrayList;
import java.util.Comparator;

public class Main {
    static class Reader
    {
        final private int BUFFER_SIZE = 1 << 16;
        private DataInputStream din;
        private byte[] buffer;
        private int bufferPointer, bytesRead;

        public Reader()
        {
            din = new DataInputStream(System.in);
            buffer = new byte[BUFFER_SIZE];
            bufferPointer = bytesRead = 0;
        }

        public Reader(String file_name) throws IOException
        {
            din = new DataInputStream(new FileInputStream(file_name));
            buffer = new byte[BUFFER_SIZE];
            bufferPointer = bytesRead = 0;
        }

        public String readLine() throws IOException
        {
            byte[] buf = new byte[64]; // line length
            int cnt = 0, c;
            while ((c = read()) != -1)
            {
                if (c == '\n')
                    break;
                buf[cnt++] = (byte) c;
            }
            return new String(buf, 0, cnt);
        }

        public int nextInt() throws IOException
        {
            int ret = 0;
            byte c = read();
            while (c <= ' ')
                c = read();
            boolean neg = (c == '-');
            if (neg)
                c = read();
            do
            {
                ret = ret * 10 + c - '0';
            }  while ((c = read()) >= '0' && c <= '9');

            if (neg)
                return -ret;
            return ret;
        }

        public long nextLong() throws IOException
        {
            long ret = 0;
            byte c = read();
            while (c <= ' ')
                c = read();
            boolean neg = (c == '-');
            if (neg)
                c = read();
            do {
                ret = ret * 10 + c - '0';
            }
            while ((c = read()) >= '0' && c <= '9');
            if (neg)
                return -ret;
            return ret;
        }

        public double nextDouble() throws IOException
        {
            double ret = 0, div = 1;
            byte c = read();
            while (c <= ' ')
                c = read();
            boolean neg = (c == '-');
            if (neg)
                c = read();

            do {
                ret = ret * 10 + c - '0';
            }
            while ((c = read()) >= '0' && c <= '9');

            if (c == '.')
            {
                while ((c = read()) >= '0' && c <= '9')
                {
                    ret += (c - '0') / (div *= 10);
                }
            }

            if (neg)
                return -ret;
            return ret;
        }

        private void fillBuffer() throws IOException
        {
            bytesRead = din.read(buffer, bufferPointer = 0, BUFFER_SIZE);
            if (bytesRead == -1)
                buffer[0] = -1;
        }

        private byte read() throws IOException
        {
            if (bufferPointer == bytesRead)
                fillBuffer();
            return buffer[bufferPointer++];
        }

        public void close() throws IOException
        {
            if (din == null)
                return;
            din.close();
        }
    }
    public static void main(String args[]) throws IOException{
        Reader in = new Reader();
        int x = in.nextInt();
        int y = in.nextInt();
        int z = in.nextInt();
        int k = in.nextInt();

        ArrayList<Long> xs = new ArrayList<>();
        ArrayList<Long> ys = new ArrayList<>();
        ArrayList<Long> zs = new ArrayList<>();
        ArrayList<Long> ttl = new ArrayList<>();
        ArrayList<Long> firstKs = new ArrayList<>();

        for (int i = 0; i < x; i++){
            xs.add(in.nextLong());
        }
        for (int i = 0; i < y; i++){
            ys.add(in.nextLong());
        }
        for (int i = 0; i < z; i++){
            zs.add(in.nextLong());
        }

        xs.sort(Comparator.reverseOrder());
        ys.sort(Comparator.reverseOrder());

        for (int i = 0; i < k && i < xs.size(); i++){
            for (int j = 0; j < k && j < ys.size(); j++){
                ttl.add(xs.get(i) + ys.get(j));
            }
        }

        ttl.sort(Comparator.reverseOrder());
        zs.sort(Comparator.reverseOrder());

        for (int i = 0; i < ttl.size() && i < k; i++){
            for (int j = 0; j < zs.size() && j < k; j++){
                firstKs.add(ttl.get(i) + zs.get(j));
            }
        }

        firstKs.sort(Comparator.reverseOrder());
        for (int i = 0; i < k; i++){
            System.out.println(firstKs.get(i));
        }
    }
}


Measured memory_bytes: 188396