#include<bits/stdc++.h>
using namespace std;
void twoNumberSum(int arr[], int targetSum, int n) {
sort(arr, arr + n);
int L = 0;
int R = n - 1;
while (L < R)
{
if (arr[L] + arr[R] < targetSum)
{
L = L + 1;
}
else if (arr[L] + arr[R] > targetSum) {
R = R - 1;
}
else if ( arr[L] + arr[R] == targetSum)
{
cout << arr[L] << "and" << arr[R] << "\n";
}
}
}
int main() {
int n;
cin >> n;
int arr[n] = {0};
for (int i = 0; i < n; ++i)
{
cin >> arr[i];
}
int targetSum;
cin >> targetSum;
twoNumberSum(arr, targetSum, n);
return 0;
}