#include
using namespace std;
int main() {
//target sum pair
int n,a[1000],target;
cin>>n;
cout<<endl;
if(n>1 and n<1000){
for(int i=0;i<n;i++){
cin>>a[i];
cout<<endl;
}
cin>>target;
int i=0,j=n-1;
for(i=0;i<n;i++){
for(j=n-1;j>=i;jā){
if(a[i]+a[j]==target){
if(a[i]<a[j])
cout<<a[i]<<" and "<<a[j]<<endl;
else
cout<<a[j]<<" and "<<a[i]<<endl;
}
}
}
}
return 0;
}