#include<iostream>
#include <bits/stdc++.h>

#define ll long long
#define ld long double
#define IO ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
using namespace std;
const int N = 3e5 + 5, inf = 2e9;


void solve(int l, int r) {
    if (l > r)return;
    int m = l + r >> 1;
    cout << m << " ";
    solve(l, m - 1);
    solve(m + 1, r);
}

void print(int m, int n) {
    for (int i = 1; i <= m; i++) {
        cout << i << " ";
    }
    solve(m + 1, n);
}

void doWork() {
    int n, k;
    cin >> n >> k;
    for (int i = 0, h = 0; i <= n; i++) {
        while ((1 << h) - 1 < i)h++;

        if (h + (n - i - 1) == k - 1) {
            print(n - i, n);
            return;
        }
    }
    cout << "impossible";
}

int main() {
    IO
    int t = 1;
    //   cin >> t;
    for (int i = 1; i <= t; i++) {
        //  cout << "Case #" << i << ": ";
        doWork();
    }
}