You are given an $n \times n$ grid.
We write $(i, j)$ to denote the cell in the $i$-th row and $j$-th column. For each cell, you are told whether yon can delete it or not.
Given an integer $k$, you are asked to delete exactly $(n-k+1)^2$ cells from the grid such that the following condition holds.
- You cannot find
$k$not deleted cells$(x_1, y_1), (x_2, y_2), \dots, (x_k, y_k)$that are strictly increasing, i.e.,$x_i \lt x_{i+1}$and$y_i \lt y_{i+1}$for all$1 \leq i \lt k$.
Your task is to find a solution, or report that it is impossible.
Input
Each test contains multiple test cases. The first line contains an integer $t$ ($1 \leq t \leq 10^5$) — the number of test cases. The following lines contain the description of each test case.
The first line of each test case contains two integers $n$ and $k$ ($2 \leq k \leq n \leq 1000$).
Then $n$ lines follow. The $i$-th line contains a binary string $s_i$ of length $n$. The $j$-th character of $s_i$ is 1 if you can delete cell $(i, j)$, and 0 otherwise.
It's guaranteed that the sum of $n^2$ over all test cases does not exceed $10^6$.
Output
For each test case, if there is no way to delete exactly $(n-k+1)^2$ cells to meet the condition, output "NO" (without quotes).
Otherwise, output "YES" (without quotes). Then, output $n$ lines. The $i$-th line should contain a binary string $t_i$ of length $n$. The $j$-th character of $t_i$ is 0 if cell $(i, j)$ is deleted, and 1 otherwise.
If there are multiple solutions, you can output any of them.
You can output "YES" and "NO" in any case (for example, strings "yEs", "yes" and "Yes" will be recognized as a positive response).
Note
For the first test case, you only have to delete cell $(1, 1)$.
For the second test case, you could choose to delete cells $(1,1)$, $(1,2)$, $(4,3)$ and $(4,4)$.
For the third test case, it is no solution because the cells in the diagonal will always form a strictly increasing sequence of length $5$.
样例
4
2 2
10
01
4 3
1110
0101
1010
0111
5 5
01111
10111
11011
11101
11110
5 2
10000
01111
01111
01111
01111
YES
01
11
YES
0011
1111
1111
1100
NO
YES
01111
11000
10000
10000
10000
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