#include <bits/stdc++.h>
using namespace std;
template <typename T>
inline int popcount(T t) {
  if (std::numeric_limits<T>::digits <=
      std::numeric_limits<unsigned int>::digits) {
    return __builtin_popcount(t);
  } else {
    return __builtin_popcountll(t);
  }
}
const long double EPS = 1e-8;
const long double PI = acosl(0.0) * 2;
void solve() {
  int n;
  cin >> n;
  vector<int> a(n);
  for (int i = 0; i < int(n); ++i) cin >> a[i];
  for (int i = 30; i >= 0; --i) {
    vector<int> b;
    int mask = (1 << i) - 1;
    for (int x : a) {
      if ((x >> i) & 1) {
        b.push_back(x);
        mask &= x;
      }
    }
    if (!mask) {
      cout << b.size() << endl;
      for (int x : b) {
        cout << x << " ";
      }
      cout << endl;
      return;
    }
  }
  assert(false);
}
int main() {
  ios_base::sync_with_stdio(false);
  solve();
  return 0;
}
