#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;
        }
    }
    for (int i=n-1;i>=0;i--){
        if(arr[i]==x) {
            last = i;
            break;
        }
    }
    if(first == -1)
    printf("-1");
    else
    printf("%d %d",first,last);
    return 0;
}