package lec02;

import java.util.Scanner;

public class Array {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		int k = scanner.nextInt();

		int a[] = new int[n];

		for (int i = 0; i < n; i++) {
			a[i] = scanner.nextInt();
		}

		int count[] = new int[100000];

		int left = 1;
		int right = 0;
		int dif = 0;

		while (right < n) {
			if (count[a[right]] == 0)
				dif++;
			count[a[right]]++;
			right++;
			while (dif == k) {
				if (count[a[left - 1]] == 1) {
					System.out.println(left + " " + right);
					System.exit(0);
				}
				count[a[left]]--;
				left++;
			}
		}
		System.out.println(-1 + " " + -1);
	}
}