Problem: 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.

Solution (in JAVA):

Solution:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class CF606A {
/*
A. Magic Spheres
time limit per test2 seconds
memory limit per test256 megabytes
input	standard input
output	standard output
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".

Sample test(s)
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.


*/

	
	public static void main(String[] args) {
		MyScanner sc = new MyScanner();
		PrintWriter out = new PrintWriter(System.out);
		int[][] values = new int[2][3];
		for(int i = 0; i<2; i++)
			for(int j = 0; j<3; j++)
				values[i][j]=sc.nextInt();
		int a = values[0][0], b=values[0][1], c=values[0][2], x=values[1][0],y=values[1][1], z=values[1][2];
		if(a==x && b == y && c==z){
			out.println("YES");
			out.close();
			return;
		}
		
		int u = 0;
		int v = 0;
		u+=a<x?x-a:0;
		v+=a>=x?(a-x)/2:0;
		u+=b<y?y-b:0;
		v+=b>=y?(b-y)/2:0;
		u+=c<z?z-c:0;
		v+=c>=z?(c-z)/2:0;
		out.println(u<=v?"Yes":"No");
		out.close();
	}

	// -----------PrintWriter for faster output---------------------------------
	public static PrintWriter out;
	
	// -----------MyScanner class for faster input----------
	public static class MyScanner {
		BufferedReader br;
		StringTokenizer st;

		public MyScanner() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}

}