import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int b=0;
int a=0;
int[] number=new int[n];
for(int i=0;i<n;i++) {
number[i]=sc.nextInt();
}
int terget=sc.nextInt();
for(int i=0;i<n-1;i++) {
for(int k=i+1;k<n;k++) {
if(number[i]+number[k]==terget) {
a=i+1;
b=k+1;
System.out.println(a+" "+b);
}
}
}
}
}