CareerCup

import java.util.Arrays;
import java.util.Scanner;

public class DistributingPackets {
	public static void main(String args[]) {
		Scanner scan = new Scanner(System.in);
		int m = scan.nextInt();
		int arr[] = new int[m];// packets containing chocolates
		for(int i=0;i<m;i++)
		{
			arr[i]=scan.nextInt();
		}
		Arrays.sort(arr);
		int n = scan.nextInt();// number of students
		int diff = Integer.MAX_VALUE;
		int index = -1;
		for (int i = 0; i <m - n + 1; i++) {
			int temp = arr[i + n - 1] - arr[i];
			if (diff > temp) {
				diff = temp;
				index = i;
			}
		}
		System.out.println("the index of choc packets starts from:-"+index+" to "+(index+n-1));
	}
	
}