Problem Statement

We have a $3 \\times 3$ grid. A number $c_{i, j}$ is written in the square $(i, j)$, where $(i, j)$ denotes the square at the $i$-th row from the top and the $j$-th column from the left.
According to Takahashi, there are six integers $a_1, a_2, a_3, b_1, b_2, b_3$ whose values are fixed, and the number written in the square $(i, j)$ is equal to $a_i + b_j$.
Determine if he is correct.

Constraints

• $c_{i, j} \\ (1 \\leq i \\leq 3, 1 \\leq j \\leq 3)$ is an integer between $0$ and $100$ (inclusive).

Input

Input is given from Standard Input in the following format:

$c_{1,1}$ $c_{1,2}$ $c_{1,3}$ $c_{2,1}$ $c_{2,2}$ $c_{2,3}$ $c_{3,1}$ $c_{3,2}$ $c_{3,3}$

Output

If Takahashi's statement is correct, print Yes; otherwise, print No.

Sample Input 1

1 0 1
2 1 2
1 0 1

Sample Output 1

Yes

Takahashi is correct, since there are possible sets of integers such as: $a_1=0,a_2=1,a_3=0,b_1=1,b_2=0,b_3=1$.

Sample Input 2

2 2 2
2 1 2
2 2 2

Sample Output 2

No

Takahashi is incorrect in this case.

Sample Input 3

0 8 8
0 8 8
0 8 8

Sample Output 3

Yes

Sample Input 4

1 8 6
2 9 7
0 7 7

Sample Output 4

No