#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m,a[100001],b[100001],c[100005];
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	for(int i=1;i<=m;i++){
		cin>>b[i];
		int l=1,r=n,ans=0;	
	while(l<=r){
		int mid=(l+r)/2;
		if(a[mid]==b[i]){
			ans=mid;
			r=mid-1;
		}
		else if(a[mid]>b[i]){
			r=mid-1;
		}
		else{
			l=mid+1;
		}
	}
		if(ans==0){
			c[i]=-1;
		}
		else{
			c[i]=ans;
		}
	}
	for(int i=1;i<=m;i++){
		cout<<c[i]<<endl;
	}
	

	
	
	return 0;
}
小鸟