1614: Battleship

Arkady is playing Battleship. The rules of this game aren't really important.

There is a field of n×nn×n cells. There should be exactly one kk-decker on the field, i. e. a ship that is kk cells long oriented either horizontally or vertically. However, Arkady doesn't know where it is located. For each cell Arkady knows if it is definitely empty or can contain a part of the ship.

Consider all possible locations of the ship. Find such a cell that belongs to the maximum possible number of different locations of the ship.

The first line contains two integers nn and kk (1≤k≤n≤1001≤k≤n≤100) — the size of the field and the size of the ship.

The next nn lines contain the field. Each line contains nn characters, each of which is either '#' (denotes a definitely empty cell) or '.' (denotes a cell that can belong to the ship).

Output two integers — the row and the column of a cell that belongs to the maximum possible number of different locations of the ship.

If there are multiple answers, output any of them. In particular, if no ship can be placed on the field, you can output any "NO".

4 3
#..#
#.#.
....
.###

3 2