Dawid has four bags of candies. The i-th of them contains a_i candies. Also, Dawid has two friends. He wants to give each bag to one of his two friends. Is it possible to distribute the bags in such a way that each friend receives the same amount of candies in total?

Note, that you can't keep bags for yourself or throw them away, each bag should be given to one of the friends.

Input

The only line contains four integers a_1, a_2, a_3 and a_4 (1 ≤ a_i ≤ 100) — the numbers of candies in each bag.

Output

Output YES if it's possible to give the bags to Dawid's friends so that both friends receive the same amount of candies, or NO otherwise. Each character can be printed in any case (either uppercase or lowercase).

Examples

Input


1 7 11 5


Output


YES


Input


7 3 2 5


Output


NO

Note

In the first sample test, Dawid can give the first and the third bag to the first friend, and the second and the fourth bag to the second friend. This way, each friend will receive 12 candies.

In the second sample test, it's impossible to distribute the bags.
//package learning;

import java.util.*;
import java.io.*;
import java.lang.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
public class NitsLocal {
    static ArrayList<String> s1;
    static boolean[] prime;
    static int n = (int)1e7;
    
     static void sieve() {
Arrays.fill(prime	, true);
prime[0] = prime[1] = false;
for(int i = 2 ; i * i <= n ; ++i) {
if(prime[i]) {
for(int k = i * i; k<= n ; k+=i) {
prime[k] = false;
}
}
}

}
    public static void main(String[] args) {
        InputReader sc = new InputReader(System.in);
        
           prime  = new boolean[n + 1];
sieve();
                prime[1] = false;
                /*
                int t = sc.ni();
                while(t-- > 0)
                {
                    int a = sc.ni();
                    int b = sc.ni();
                    int d = sc.ni();
                    
                    int p = (a + d + 1 - b)/2;
                    
                    if(p < 0)
                    {
                        p = 0;
                        //if(a > b)
                           // p = 1;
                    }
                    w.println(p);
                    
                }
                
                 */
                
               
                int a = sc.ni();
                int b = sc.ni();
                int c = sc.ni();
                int d = sc.ni();
                int s  = a +b+c+d;
                if(s%2==0)
                {
                    int t = s/2;
                    ArrayList<Integer> a1 = new ArrayList<>();
                    a1.add(a);
                    a1.add(b);
                    a1.add(c);
                    a1.add(d);
                    Collections.sort(a1);
                    if(a1.get(3) == t || a1.get(2)+a1.get(3) == t || a1.get(1)+a1.get(3) ==t || a1.get(0)+a1.get(3)==t)
                    {
                        w.println("YES");
                        
                    }
                    else
                        w.println("NO");
                }
                else
                    w.println("NO");

               /*
   
                  int n = sc.ni();
                  int k = sc.ni();
                  String s = sc.rs();
                  char []c = s.toCharArray();
                  for(int i=0;i<n;i++)
                  {
                      if(k==0)
                          break;
                      if(i==0 && n > 1)
                      {
                          if(c[i] != '1')
                          {
                          c[i] = '1';
                          k--;
                          }
                      }
                      else
                      {
                          if(c[i] != '0')
                          {
                              c[i] = '0';
                              k--;
                          }
                      }
                      
                  }
                  w.println(String.valueOf(c));
                     
  
      */
  
  
      
       w.close();
        
    }
    static int gcd(int a,int b)
    {
        if(a==0)
            return b;
        else
            return gcd(b%a,a);
    }
    static class Temp{
        int a;
        int b;
        int d;
        Temp(int a,int b,int d)
        {
            this.a = a;
            this.b = b;
            this.d = d;
        }
    }
    static class Query{
        int p;
        int index;
        int value;
        public Query(int p,int index,int value)
        {
            this.p = p;
            this.index = index;
            this.value = value;
            
        }
    }
    static int nextPowerOf2(int n) 
    { 
        int count = 0; 
  
        // First n in the below  
        // condition is for the  
        // case where n is 0 
        if (n > 0 && (n & (n - 1)) == 0) 
            return n; 
  
        while(n != 0) 
        { 
            n >>= 1; 
            count += 1; 
        } 
  
        return 1 << count; 
    } 
    
   static long sum1(int t1,int t2,int x,int []t)
   {
       int mid = (t2-t1+1)/2;
  if(t1==t2)
      return 0;
    
   else
   return sum1(t1,mid-1,x,t) + sum1(mid,t2,x,t);
    
     
   }
  
   
    static String replace(String s,int a,int n)
    {
        char []c = s.toCharArray();
        for(int i=1;i<n;i+=2)
        {
            int num = (int) (c[i] - 48);
            num += a;
            num%=10;
            c[i] = (char) (num+48);
        }
        return new String(c);
    }
    static String move(String s,int h,int n)
    {
        h%=n;
        char []c = s.toCharArray();
        char []temp = new char[n];
        for(int i=0;i<n;i++)
        {
            temp[(i+h)%n] = c[i];
        }
        return new String(temp);
    }
    
     public static int ip(String s){
return Integer.parseInt(s);
}
     static class multipliers implements Comparator<Long>{
  
         
  public int compare(Long a,Long b) {
   if(a<b)
    return 1;
   else if(b<a)
    return -1;
   else
    return 0;
  }
 }
     static class multipliers1 implements Comparator<Student>{
  
  public int compare(Student a,Student b) {
   if(a.y<b.y)
    return 1;
   else if(b.y<a.y)
    return -1;
   else
   {
       if(a.id < b.id)
           return 1;
       else if(b.id<a.id)
           return -1;
       else
           return 0;
           
    //return 0;
   }
  }
 }
    // Java program to generate power set in 
// lexicographic order. 

    
    
    
      static class InputReader {
 
private final InputStream stream;
private final byte[] buf = new byte[8192];
private int curChar, snumChars;
 
public InputReader(InputStream st) {
this.stream = st;
}
 
public int read() {
if (snumChars == -1)
throw new InputMismatchException();
if (curChar >= snumChars) {
curChar = 0;
try {
snumChars = stream.read(buf);
} catch (IOException e) {
throw new InputMismatchException();
}
if (snumChars <= 0)
return -1;
}
return buf[curChar++];
}
 
public int ni() {
int c = read();
while (isSpaceChar(c)) {
c = read();
}
int sgn = 1;
if (c == '-') {
sgn = -1;
c = read();
}
int res = 0;
do {
res *= 10;
res += c - '0';
c = read();
} while (!isSpaceChar(c));
return res * sgn;
}
 
public long nl() {
int c = read();
while (isSpaceChar(c)) {
c = read();
}
int sgn = 1;
if (c == '-') {
sgn = -1;
c = read();
}
long res = 0;
do {
res *= 10;
res += c - '0';
c = read();
} while (!isSpaceChar(c));
return res * sgn;
}
 
public int[] nia(int n) {
int a[] = new int[n];
for (int i = 0; i < n; i++) {
a[i] = ni();
}
return a;
}
 
public String rs() {
int c = read();
while (isSpaceChar(c)) {
c = read();
}
StringBuilder res = new StringBuilder();
do {
res.appendCodePoint(c);
c = read();
} while (!isSpaceChar(c));
return res.toString();
}
 
public String nextLine() {
int c = read();
while (isSpaceChar(c))
c = read();
StringBuilder res = new StringBuilder();
do {
res.appendCodePoint(c);
c = read();
} while (!isEndOfLine(c));
return res.toString();
}
 
public boolean isSpaceChar(int c) {
return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
}
 
private boolean isEndOfLine(int c) {
return c == '\n' || c == '\r' || c == -1;
}
 
}





   
static PrintWriter w = new PrintWriter(System.out);
                  static class Student
    {
        int id;
        //int x;
       
        int y;
        //long z;
        
        Student(int id,int y)
        {
            this.id = id;
            //this.x = x;
            //this.s = s;
            this.y = y;
           // this.z = z;
            
            
            
        }
        
    }
}
