// NK
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ii pair<int,int>
#define vi vector<int>
#define vii vector<ii>
#define vll vector<ll>
#define eb emplace_back
#define pb push_back
#define pob pop_back
#define psf push_front
#define pof pop_front
#define mkp make_pair
#define all(x) x.begin(), x.end()
 
int main(){
  ll n,k; cin>>n>>k;
  if (n==1){
  	if (k>0) cout<<-1;
  	else cout<<1;
  	return 0;
  }
  ll mini=n/2, firstpair=k-(mini-1);
  if (mini>k) {cout<<-1; return 0;}
  ll a=firstpair,b=firstpair*2;
  cout<<a<<' '<<b<<' ';
  for (ll i=1, c=2; c<n; i+=2, c+=2){
  	if (c+1==n) break;
  	if (i!=a and i!=b and i+1!=a and i+1!=b) cout<<i<<' '<<i+1<<' ';
  	else c-=2;
  }
  if (n&1) cout<<1000000000;
  return 0;
}
 

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