#include<bits/stdc++.h>

#define pb push_back
#define ld long double
#define llong long long
#define F first
#define S second
#define null nullptr
#define TIME 1.0*clock()/CLOCKS_PER_SEC
#define endl '\n'

using namespace std;

const int N = 1e3 + 1e3;
const int M = 5e5 + 5;
const int sz = 1399;
const ld eps = 0.00000001;


int32_t main() {
#ifdef LOCAL
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
#else
//    freopen("division.in","r",stdin);
//    freopen("division.out","w",stdout);
#endif
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int x, y;
    cin >> x >> y;
    set <int> a, b;
    llong s = 0;
    for(int i = 1;  s <= x; i++) {
        int ost = x - s;
//        cerr << s << endl;
        if (ost >= i) {
            if (i + s > x) break;
            a.insert(i);
            s += i;
        } else {
            int kek = i - ost;
            if (s - kek + i > x) break;
            a.erase(kek);
            s -= kek;
            a.insert(i);
            s += i;
        }
        if (s == x) break;
    }

    s = 0;

    for(int i = 1; i + s <= y; i++) {
        if (a.count(i)) continue;
        int ost = x - s;
        if (ost >= i) {
            if (i + s > y) break;
            b.insert(i);
            s += i;
        } else {
            int kek = i - ost;
            if (s - kek + i > y) break;
            b.erase(kek);
            s -= kek;
            b.insert(i);
            s += i;
        }
        if (s == y) break;
    }

    cout << a.size() << endl;
    for(auto &to: a) {
        cout << to << ' ';
    }
    cout << endl;
    cout << b.size() << endl;
    for(auto &to: b) {
        cout << to << ' ';
    }
    cout << endl;






    return 0;

}