Carl is a beginner magician. He has a blue, b violet and c orange magic spheres. In one move he can transform two spheres of the same color into one sphere of any other color. To make a spell that has never been seen before, he needs at least x blue, y violet and z orange spheres. Can he get them (possible, in multiple actions)?

Input

The first line of the input contains three integers a, b and c (0 ≤ a, b, c ≤ 1 000 000) — the number of blue, violet and orange spheres that are in the magician's disposal.

The second line of the input contains three integers, x, y and z (0 ≤ x, y, z ≤ 1 000 000) — the number of blue, violet and orange spheres that he needs to get.

Output

If the wizard is able to obtain the required numbers of spheres, print "Yes". Otherwise, print "No".

Examples

Input

4 4 0
2 1 2


Output

Yes


Input

5 6 1
2 7 2


Output

No


Input

3 3 3
2 2 2


Output

Yes

Note

In the first sample the wizard has 4 blue and 4 violet spheres. In his first action he can turn two blue spheres into one violet one. After that he will have 2 blue and 5 violet spheres. Then he turns 4 violet spheres into 2 orange spheres and he ends up with 2 blue, 1 violet and 2 orange spheres, which is exactly what he needs.
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;

public class CF2_335A {
  
  static Reader sc = new Reader();
  static PrintWriter out = new PrintWriter(System.out);
  
  public static void main(String[] args) throws IOException {
    int[] from = {sc.nextInt(), sc.nextInt(), sc.nextInt()};
    int[] to = {sc.nextInt(), sc.nextInt(), sc.nextInt()};
    
    int[] diff = {from[0] - to[0], from[1] - to[1], from[2] - to[2]};
    
    int need = 0;
    
    for (int i = 0; i < 3; i++) {
      if (diff[i] < 0) {
        need += - diff[i];
      }
    }
        
    int canGet = 0;
    
    for (int i = 0; i < 3; i++) {
      if (diff[i] > 0) {
        canGet += diff[i] / 2; 
      }
    }
    
    if (canGet >= need) {
      out.println("Yes");
    } else {
      out.println("No");
    }
    out.close();
  }
  
  static class Reader {
    boolean consume = false; final private int BUFFER_SIZE = 1 << 12;private byte[] buffer;private int bufferPointer, bytesRead;private boolean reachedEnd = false;public Reader() {buffer = new byte[BUFFER_SIZE];bufferPointer = 0;bytesRead = 0;}
    public boolean hasNext() {return !reachedEnd;} private void fillBuffer() throws IOException {bytesRead = System.in.read(buffer, bufferPointer = 0, BUFFER_SIZE);if (bytesRead == -1) {buffer[0] = -1;reachedEnd = true;}}
    private void consumeSpaces() throws IOException {while (read() <= ' ' && reachedEnd == false);bufferPointer--;} private byte read() throws IOException {if (bufferPointer == bytesRead) {fillBuffer();}return buffer[bufferPointer++];}
    public String next() throws IOException {StringBuilder sb = new StringBuilder();consumeSpaces();byte c = read();do {sb.append((char) c);} while ((c = read()) > ' ');if (consume) {consumeSpaces();};if (sb.length() == 0) {return null;}return sb.toString();}
    public String nextLine() throws IOException {StringBuilder sb = new StringBuilder();byte c;boolean read = false;while ((c = read()) != -1) {if (c == '\n') {read = true;break;}if (c >= ' ')sb.append((char) c);}if (!read) {return null;}return sb.toString();}
    public int nextInt() throws IOException {consumeSpaces();int ret = 0;      byte c = read();boolean neg = (c == '-');if (neg) {c = read();}do {ret = ret * 10 + c - '0';} while ((c = read()) >= '0' && c <= '9');if (consume) {consumeSpaces();}if (neg) {return -ret;}return ret;}
    public long nextLong() throws IOException {consumeSpaces();long ret = 0;byte c = read();boolean neg = (c == '-');if (neg) {c = read();}do {ret = ret * 10L + c - '0';} while ((c = read()) >= '0' && c <= '9');if (consume) {consumeSpaces();}if (neg) {return -ret;}return ret;}
    public double nextDouble() throws IOException {consumeSpaces();double ret = 0;double div = 1;byte c = read();boolean neg = (c == '-');if (neg) {c = read();}do {ret = ret * 10 + c - '0';} while ((c = read()) >= '0' && c <= '9');if (c == '.') {while ((c = read()) >= '0' && c <= '9') {ret += (c - '0') / (div *= 10);}}if (consume) {consumeSpaces();}if (neg) {return -ret;}return ret;}    public int[] nextIntArray(int n) throws IOException {int[] a = new int[n];for (int i = 0; i < n; i++) {a[i] = nextInt();}return a;}
    public int[][] nextIntMatrix(int n, int m) throws IOException {int[][] grid = new int[n][m];for (int i = 0; i < n; i++) {grid[i] = nextIntArray(m);}return grid;}
    public char[][] nextCharacterMatrix(int n) throws IOException {char[][] a = new char[n][];for (int i = 0; i < n; i++) {a[i] = next().toCharArray();}return a;}
    public void close() throws IOException {if (System.in == null) {return;} else {System.in.close();}}
  }
  
  static void print(int[] A) {for (int i = 0; i < A.length; i++) {if (i != 0) {out.print(' ');}out.print(A[i]);}out.println();}
  static <T> void print(Iterable<T> A) {int i = 0;for (T act : A) {if (i != 0) {out.print(' ');}out.print(act);i++;}out.println();}
  static void printPlus1(Iterable<Number> A) {int i = 0;for (Number act : A) {if (i != 0) {out.print(' ');}out.print(act.longValue() + 1L);i++;}out.println();  }
  static void debug(Object... o) {System.err.println(Arrays.deepToString(o));}
  
  /*
  long s = System.currentTimeMillis();
  debug(System.currentTimeMillis() - s + "ms");
   */
}
