#include<iostream>
using namespace std;

const int N = 100010;
int q[N];

int main()
{
    int n,m;
    cin >> n >> m;
    for(int i=0;i<n;i++) cin >> q[i];

    while(m--)
    {
        int x;
        cin >> x;

        int l=0,r=n-1;
        while(l<r)
        {
            int mid = l+r>>1;
            if(q[mid] >= x) r=mid;
            else l = mid+1;
        }
        if(q[l] != x) cout << "-1 -1" << endl;
        else
        {
            cout << l << " ";
            l=0,r=n-1;
            while(l<r)
            {
                int mid = l+r+1>>1;
                if(q[mid] <= x) l=mid;
                else r = mid-1;
            }
            cout << l << endl;
        }


    }


    return 0;
} ****