#include<iostream>
using namespace std;

int n,m,q[100000];

int main(){
    cin>>n>>m;
    for(int i=0;i<n;i++)scanf("%d",&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(x!=q[r])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<<r<<endl;
        }
    }
    return 0;
}