#include<iostream>
#include<cstdio>
using namespace std;
const int N = 1E5 + 5;
int n, k, a[N];
void brust() // 朴素做法
{
    int f = 0;
    for(int i = 1; i <= n; i++)
        if(a[i] == k)
        {
            cout << i << " ";
            f = 1;
            break;
        }
    if(f == 1)
        cout << k << endl;
    else cout << -1 << endl;
}
void handle() // 二分模板
{
    int ans = 0;
    int left = 1, right = n;
    while(left <= right)
    {
        int mid = (right - left) / 2 + left; // (right + left) / 2
        if(a[mid] >= k)
        {
            ans = mid;
            right = mid - 1;
        }
        else
        {            
            left = mid + 1;
        }
            
    }
    if(ans && a[ans] == k) cout << ans << " " << k << endl;
    else cout << -1 << endl;
    
}
void initInput()
{
    cin >> n >> k;
    for(int i = 1; i <= n; i++)
        cin >> a[i];
}
int main(void)
{
    initInput();
    //brust();
    handle();
    return 0;
}