#include <stdio.h>
int main()
{
    int n, x;
    scanf("%d", &n);
    scanf("%d", &x);
    if(n < 0 || x<  0)
    {
        printf("Invaid input");
        return 0;
    }
    int arr[n];
    for (int i = 0; i < n; i++)
    {
        scanf("%d", &arr[i]);
    }
    int first = -1, last = -1;
    for (int i = 0; i < n; i++)
    {
        if (arr[i] == x)
        {
            first = i;
            break;
        }
    }
    if(first == -1)
    prinf("-1");
    else
    printf("%d %d", first, last);
    return 0;
}