algo. number_range

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt(), q = sc.nextInt();
        int[] arr = new int[n];
        for (int i = 0; i < n; i++) {
            arr[i] = sc.nextInt();
        }
        while (q-- > 0) {
            int target = sc.nextInt();
            int l = 0, r = n - 1;
            while (l < r) {
                int mid = l + r >> 1;
                if (arr[mid] >= target) r = mid;
                else l = mid + 1;
            }
            if (arr[l] != target) {
                System.out.println("-1 -1");
                continue;
            }
            int start = l;
            l = 0; r = n - 1;
            while (l < r) {
                int mid = l + r + 1 >> 1;
                if (arr[mid] <= target) l = mid;
                else r = mid - 1;
            }
            int end = l;
            System.out.println(start + " " + end);
        }
    }
}