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