import java.util.*;

class Node {
    int data;
    Node left, right;

    public Node(int item) {
        data = item;
        left = right = null;
    }
}

class BinarySearchTree {
    Node constructBST(int[] arr, int start, int end, Node root) {
        if (start > end)
            return null;
        int mid = (start + end) / 2;

        if (root == null)
            root = new Node(arr[mid]);

        root.left = constructBST(arr, start, mid - 1, root.left);
        root.right = constructBST(arr, mid + 1, end, root.right);

        return root;

    }
}

public class Main {
    public static void main(String[] args) throws Throwable {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int arr[] = new int[n];
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextInt();
        }
        int target = sc.nextInt();
        Arrays.sort(arr);
        Node root = null;
        BinarySearchTree bst = new BinarySearchTree();
        root = bst.constructBST(arr, 0, n - 1, root);
        Accio A = new Accio();
        A.targetSum(root, target);
        sc.close();
    }
}
class Accio {
    boolean t=false;
    public boolean find(Node node, int data) {
        if (node == null) {
            return false;
        }
        if (data > node.data) {
            return find(node.right, data);
        } else if (data < node.data) {
            return find(node.left, data);
        } else {
            return true;
        }
    }
    public void targetSumPair(Node root, Node node, int tar) {
        if (node == null) {
            return;
        }
        targetSumPair(root, node.left, tar);
        int comp = tar - node.data;
        if (comp > node.data) {
            if (find(root, comp)) {
                t=true;
                System.out.println(node.data + " " + comp);
            }
        }
        targetSumPair(root, node.right, tar);
    }
    public void targetSum(Node root, int tar)
    {
        targetSumPair(root, root, tar);
        if(t==false)
        System.out.println(-1);
    }
}