import java.util.Scanner;
class sam{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int ind =  sc.nextInt();
        if(ind<0){
            System.out.print("Invalid input");
            return;
        }
        int tar = sc.nextInt();
        int fi = 0;
        int li = 0;
        int con =0;
        int con2=0;
        int[] arr = new int[ind];
        for(int i=0;i<ind;i++){
            arr[i] = sc.nextInt();
        }
        for(int j=0;j<ind;j++){
            if(arr[j]==tar){
                con2=1;
                if(con==0){
                    fi = j;
                    con = 1;
                }
                else{
                    li = j;
                }
            }
        }
        if(con2=0){
            System.out.print(-1);
        }
        else{
            System.out.print(fi+" "+li);
            
        }
    }
}