A15243. Almost Ternary Matrix

You are given two even integers $n$ and $m$ . Your task is to find any binary matrix $a$ with $n$ rows and $m$ columns where every cell $(i,j)$ has exactly two neighbours with a different value than $a_{i,j}$ .

Two cells in the matrix are considered neighbours if and only if they share a side. More formally, the neighbours of cell $(x,y)$ are: $(x-1,y)$ , $(x,y+1)$ , $(x+1,y)$ and $(x,y-1)$ .

It can be proven that under the given constraints, an answer always exists.

Each test contains multiple test cases. The first line of input contains a single integer $t$ ( $1 \le t \le 100$ ) — the number of test cases. The following lines contain the descriptions of the test cases.

The only line of each test case contains two even integers $n$ and $m$ ( $2 \le n,m \le 50$ ) — the height and width of the binary matrix, respectively.

For each test case, print $n$ lines, each of which contains $m$ numbers, equal to $0$ or $1$ — any binary matrix which satisfies the constraints described in the statement.

It can be proven that under the given constraints, an answer always exists.

White means $0$ , black means $1$ .

The binary matrix from the first test caseThe binary matrix from the second test caseThe binary matrix from the third test case