You are given four integers `row`, `cols`, `rCenter`, and `cCenter`. There is a `rows x cols` matrix and you are on the cell with the coordinates `(rCenter, cCenter)`.

Return the coordinates of all cells in the matrix, sorted by their distance from `(rCenter, cCenter)` from the smallest distance to the largest distance. You may return the answer in any order that satisfies this condition.

The distance between two cells `(r1, c1)` and `(r2, c2)` is `|r1 - r2| + |c1 - c2|`.

Example 1:

    Input: rows = 1, cols = 2, rCenter = 0, cCenter = 0
    Output: [[0,0],[0,1]]
    Explanation: The distances from (0, 0) to other cells are: [0,1]

Example 2:

    Input: rows = 2, cols = 2, rCenter = 0, cCenter = 1
    Output: [[0,1],[0,0],[1,1],[1,0]]
    Explanation: The distances from (0, 1) to other cells are: [0,1,1,2]
    The answer [[0,1],[1,1],[0,0],[1,0]] would also be accepted as correct.

Example 3:

    Input: rows = 2, cols = 3, rCenter = 1, cCenter = 2
    Output: [[1,2],[0,2],[1,1],[0,1],[1,0],[0,0]]
    Explanation: The distances from (1, 2) to other cells are: [0,1,1,2,2,3]
    There are other answers that would also be accepted as correct, such as [[1,2],[1,1],[0,2],[1,0],[0,1],[0,0]].

Constraints:

- `1 <= rows, cols <= 100`
- `0 <= rCenter < rows`
- `0 <= cCenter < cols`