#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int a, b, c, d;
  cin >> a >> b >> c >> d;
  if (a > b + 1 || d > c + 1) {
    cout << "NO";
    return 0;
  }
  if (a == b + 1) {
    if (c > 0 || d > 0) {
      cout << "NO";
      return 0;
    }
    cout << "YES\n";
    for (int i = 0; i < a; i++) {
      cout << "0 ";
      if (i != a - 1) cout << "1 ";
    }
    return 0;
  }
  if (d == c + 1) {
    if (a > 0 || b > 0) {
      cout << "NO";
      return 0;
    }
    cout << "YES\n";
    for (int i = 0; i < d; i++) {
      cout << "3 ";
      if (i != d - 1) cout << "2 ";
    }
    return 0;
  }
  int extb = b - a;
  int extc = c - d;
  vector<int> ans;
  if (extb == extc + 1) {
    ans.push_back(1);
    for (int i = 0; i < a; ++i) {
      ans.push_back(0);
      ans.push_back(1);
    }
    for (int i = 0; i < extc; ++i) {
      ans.push_back(2);
      ans.push_back(1);
    }
    for (int i = 0; i < d; ++i) {
      ans.push_back(2);
      ans.push_back(3);
    }
  } else if (extb == extc) {
    for (int i = 0; i < a; ++i) {
      ans.push_back(0);
      ans.push_back(1);
    }
    for (int i = 0; i < extc; ++i) {
      ans.push_back(2);
      ans.push_back(1);
    }
    for (int i = 0; i < d; ++i) {
      ans.push_back(2);
      ans.push_back(3);
    }
  } else if (extb + 1 == extc) {
    for (int i = 0; i < a; ++i) {
      ans.push_back(0);
      ans.push_back(1);
    }
    for (int i = 0; i < extb; ++i) {
      ans.push_back(2);
      ans.push_back(1);
    }
    for (int i = 0; i < d; ++i) {
      ans.push_back(2);
      ans.push_back(3);
    }
    ans.push_back(2);
  } else {
    cout << "NO";
    return 0;
  }
  cout << "YES\n";
  for (auto it : ans) cout << it << " ";
  return 0;
}
