#include <bits/stdc++.h>
using namespace std;
const int N=100010;
int a[N],q,n;
int main()
{
    cin>>n>>q;
    for(int i=0;i<n;i++) cin>>a[i];
    while(q--)
    {
        int x;
        cin>>x;
        int l=0,r=n-1;
        while(l<r)
        {
            int mid=(l+r)/2;
            if(a[mid]>=x) r=mid;
            else l=mid+1;
        }
        if(a[l]!=x) cout<<-1<<" "<<-1<<endl;
        else 
        {
            cout<<l<<" ";
            l=0,r=n-1;
            while(l<r)
            {
                int mid=(l+r+1)/2;
                if(a[mid]<=x) l=mid;
                else r=mid-1;
            }
            cout<<l<<endl;
        }
    }
}