#include<iostream>
using namespace std;


int main(void)
{
    int n,m,x;
    scanf("%d %d",&n,&m);
        int a[n];
    for(int i=0;i<n;i++)
        scanf("%d",&a[i]);
    while(m--)
    {
        scanf("%d",&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;
}