import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.NoSuchElementException;
 
public class Main {
	static List<Long> a;
	static List<Long> b;
	static List<Long> c;
	
	public static void main(String[] args) {
		FastScanner sc = new FastScanner();
		int x = sc.nextInt();
		int y = sc.nextInt();
		int z = sc.nextInt();
		int k = sc.nextInt();
		a = new ArrayList<>();
		b = new ArrayList<>();
		c = new ArrayList<>();
		for(int i =0; i < x; i++)
			a.add(Long.parseLong(sc.next()));
		for(int i = 0; i < y; i++)
			b.add(Long.parseLong(sc.next()));
		for(int i = 0; i < z; i++)
			c.add(Long.parseLong(sc.next()));
		
		Collections.sort(a, Collections.reverseOrder());
		Collections.sort(b, Collections.reverseOrder());
		Collections.sort(c, Collections.reverseOrder());
		
		List<Long> ab = new ArrayList<>();
		for(int i = 0; i < x; i++)
			for(int j = 0; j < y; j++)
				ab.add(a.get(i) + b.get(j));
		Collections.sort(ab, Collections.reverseOrder());
		int size = Math.min(k, ab.size());
		List<Long> abc = new ArrayList<>();
		
		for(int i = 0; i < size; i++) 
			for(int j = 0; j < z; j++)
				abc.add(ab.get(i) + c.get(j));
		
		Collections.sort(abc, Collections.reverseOrder());

		for(int i = 0; i < k; i++)
			System.out.println(abc.get(i));
	}
}

class FastScanner {
    private final InputStream in = System.in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }
    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
    public int nextInt() {
        long nl = nextLong();
        if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
        return (int) nl;
    }
    public double nextDouble() { return Double.parseDouble(next());}
}

Measured memory_bytes: 188424