#include
#include
using namespace std;
int main() {
int target;
int n,i;
int x=0;
cin>>n;
int a[n];
for(i=0;i<n;i++){
cin>>a[i];
}
cin>>target;
sort(a,a+n);
int l=0;
int r=n-1;
while(l<r){
x=l+r;
if(x == target)
{
cout<<l<<" and "<<r<<endl;
l++;
}
r–;
}
return 0;
}