#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int t = 1;
  while (t--) {
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    if (a > b + 1 || d > c + 1) {
      cout << "NO" << endl;
      continue;
    }
    if (a == b + 1) {
      if (c == 0 && d == 0) {
        cout << "YES" << endl;
        cout << 0 << " ";
        for (int i = 0; i < b; i++) cout << 1 << " " << 0 << " ";
        cout << endl;
      } else {
        cout << "NO" << endl;
      }
      continue;
    }
    if (c + 1 == d) {
      if (a == 0 && b == 0) {
        cout << "YES" << endl;
        cout << 3 << " ";
        for (int i = 0; i < c; i++) cout << 2 << " " << 3 << " ";
        cout << endl;
      } else {
        cout << "NO" << endl;
      }
      continue;
    }
    int r1 = b - a, r2 = c - d;
    if (r1 == r2) {
      cout << "YES" << endl;
      for (int i = 0; i < a; i++) {
        cout << 0 << " " << 1 << " ";
      }
      for (int i = 0; i < r1; i++) {
        cout << 2 << " " << 1 << " ";
      }
      for (int i = 0; i < d; i++) {
        cout << 2 << " " << 3 << " ";
      }
      cout << endl;
    } else if (r1 == r2 + 1) {
      cout << "YES" << endl;
      cout << 1 << " ";
      for (int i = 0; i < a; i++) {
        cout << 0 << " " << 1 << " ";
      }
      for (int i = 0; i < r2; i++) {
        cout << 2 << " " << 1 << " ";
      }
      for (int i = 0; i < d; i++) {
        cout << 2 << " " << 3 << " ";
      }
      cout << endl;
    } else if (r2 == r1 + 1) {
      cout << "YES" << endl;
      for (int i = 0; i < a; i++) {
        cout << 0 << " " << 1 << " ";
      }
      for (int i = 0; i < r1; i++) {
        cout << 2 << " " << 1 << " ";
      }
      for (int i = 0; i < d; i++) {
        cout << 2 << " " << 3 << " ";
      }
      cout << 2 << endl;
    } else {
      cout << "NO" << endl;
    }
  }
  return 0;
}
