include<bits/stdc++.h>

using namespace std; long long n,t,x,i,a[100002]; int chat(long long x) { int l=1,r=n,luu=-1; while(l<=r) { int mid=(l+r)/2; if(a[mid]==x) { luu=mid; r=mid-1; } else if(a[mid]>x)r=mid-1; else l=mid+1; } return luu; } int main() { cin>>n>>t; for(i=1;i<=n;i++)cin>>a[i]; while(t--) { long long y;cin>>y; cout<<chat(y)<