import std.stdio, std.conv, std.string, std.array, std.range, std.algorithm, std.container;
import std.math, std.random, std.bigint, std.datetime, std.format;
void main(string[] args){ if(args.length > 1) if(args[1] == "-debug") DEBUG = 1; solve(); }
void log()(){ writeln(""); } void log(T, A ...)(T t, lazy A a){ if(DEBUG) write(t, " "), log(a); } bool DEBUG = 0; 
string read(){ static string[] ss; while(!ss.length) ss = readln.chomp.split; string res = ss[0]; ss.popFront; return res; }
T rtype(T)(){ return read.to!T; } alias rint = rtype!int, rlong = rtype!long, rreal = rtype!real;
T[] rtypes(T)(int n){ return n.iota.map!(i => rtype!T()).array; } alias rint = rtypes!int, rlong = rtypes!long, rreal = rtype!real;

// ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- //

void solve(){
	long m = rlong;
	long k = rlong;
	
	long n = 1L << m;
	
	if(n <= k){
		"-1".writeln;
		return;
	}
	if(m == 1 && k == 1){
		"-1".writeln;
		return;
	}
	if(m == 1 && k == 0){
		"0 0 1 1".writeln;
		return;
	}
	
	long[] ans;
	foreach(i; 0 .. n) if(i != k) ans ~= i;
	ans ~= k;
	foreach_reverse(i; 0 .. n) if(i != k) ans ~= i;
	ans ~= k;
	
	ans.map!(to!string).array.join(" ").writeln;
}
