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