#include<bits/stdc++.h>
using namespace std;
const int N=100010;
int a[N];
int n,q;
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>>1;
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>>1;
if(a[mid]<=x)l=mid;
else r=mid-1;
}
cout<<l<<endl;
}
}
return 0;
}