#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (long long i = 0; i < n; ++i)
using ll = long long;
constexpr ll INF = 1ll<<30;
constexpr ll longINF = 1ll<<60;
constexpr ll MOD = 998244353;
constexpr bool debug = false;
template<class T> inline bool chmin(T& a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}
template<class T> inline bool chmax(T& a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}
//---------------------------------//

int main(){
    int X, Y;
    cin >> X >> Y;

    cout << "4" << endl << X << " " << Y << " " << Y << " " << Y << endl;
    int rhs;
    cin >> rhs;

    if (X == Y){
        if (rhs == X) cout << X << endl;
        else cout << (1 - X) << endl;
    } else {
        if (rhs == X) cout << X << endl;
        else cout << (1 - X) << endl;
    }

    return 0;
}