// editor2
#include<stdio.h>
#include<stdlib.h>
int main(){
    int n,x;
    scanf("%d",&n);
    if (n<=0){
        printf("Invalid input\n");
        return 0;
    }
    scanf("%d,&x");
    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){
            if(first ==-1) first =i;
            last =i;
        }
    }
    if (first ==-1){
        printf("-1\n");
    }else{
        printf("%d %d\n", first,last);
    }
    return 0;
}