import java.util.Scanner;
public class allIndices {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc=new Scanner(System.in);
int n = sc.nextInt();
int[] arr = new int[n];
for(int i=0;i<arr.length;i++) {
arr[i]=sc.nextInt();
}
int data = sc.nextInt();
int[] li = allIndices(arr,0,data,0);
if(li.length==0) {
System.out.println();
return;
}
for(int i=0;i<li.length;i++) {
System.out.println(li[i]);
}
}
public static int[] allIndices(int[] arr,int si,int data,int count) {
if(si==arr.length) {
int[] base=new int[count];
return base;
}
int[] indices = null;
if(arr[si]==data) {
indices=allIndices(arr,si+1,data,count+1);
}else {
indices=allIndices(arr,si+1,data,count);
}
if(arr[si]==data) {
indices[count]=si;
}
return indices;
}
}
