#include <bits/stdc++.h>
using namespace std;
const double PI = 3.14159265358979323846;
const double eps = (1e-5);
long long isGreater(long double x, long double y) {
  if (abs(x - y) < eps) return 0;
  if (x > y) return 1;
  return -1;
}
int cnt[4];
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int n = 0;
  int iniCnt[4];
  for (int i = 0; i < 4; ++i) {
    cin >> cnt[i];
    iniCnt[i] = cnt[i];
    n += cnt[i];
  }
  vector<int> a(n, -1);
  for (int i = 0; cnt[0] > 0; i += 2) {
    a[i] = 0;
    cnt[0]--;
    if (cnt[1]) {
      a[i + 1] = 1;
      cnt[1]--;
    } else {
      if (cnt[0] || iniCnt[2] || iniCnt[3]) {
        cout << "NO\n";
        return 0;
      }
    }
  }
  for (int i = n - 1; cnt[3] > 0; i -= 2) {
    a[i] = 3;
    cnt[3]--;
    if (cnt[2]) {
      a[i - 1] = 2;
      cnt[2]--;
    } else {
      if (iniCnt[0] || iniCnt[1] || cnt[3]) {
        cout << "NO\n";
        return 0;
      }
    }
  }
  int first = -1, last = -1;
  for (int i = 0; i < n; ++i) {
    if (a[i] == -1) {
      last = i;
      if (first == -1) first = i;
    }
  }
  int turn = 0;
  while (first < last && first != -1) {
    if (!turn) {
      a[first] = 2;
      a[last] = 1;
    } else {
      a[first] = 1;
      a[last] = 2;
    }
    ++first;
    --last;
    turn = !turn;
    cnt[1]--;
    cnt[2]--;
  }
  bool extraOne = 0, extraTwo = 0;
  if (cnt[1]) {
    --cnt[1];
    extraOne = true;
  }
  if (cnt[2]) {
    --cnt[2];
    extraTwo = true;
  }
  if (cnt[1] || cnt[2]) {
    cout << "NO\n";
    return 0;
  }
  cout << "YES\n";
  if (extraOne) cout << 1 << ' ';
  for (int i = 0; i < n; ++i) {
    if (a[i] != -1) cout << a[i] << ' ';
  }
  if (extraTwo) cout << 2;
  return 0;
}
