1028_A. Find Square
Consider a table of size n × m, initially fully white. Rows are numbered 1 through n from top to bottom, columns 1 through m from left to right. Some square inside the table with odd side length was painted black. Find the center of this square.

Input

The first line contains two integers n and m (1 ≤ n, m ≤ 115) — the number of rows and the number of columns in the table.

The i-th of the next n lines contains a string of m characters s_{i1} s_{i2} … s_{im} (s_{ij} is 'W' for white cells and 'B' for black cells), describing the i-th row of the table.

Output

Output two integers r and c (1 ≤ r ≤ n, 1 ≤ c ≤ m) separated by a space — the row and column numbers of the center of the black square.

Examples

Input

5 6
WWBBBW
WWBBBW
WWBBBW
WWWWWW
WWWWWW


Output

2 4


Input

3 3
WWW
BWW
WWW


Output

2 1
```python
import os
import sys
import math

def main():
    n,m = [int(i) for i in input().split()]
    centeri, centerj = -1,-1
    starti, startj = -1,-1
    for i in range(n):
        s = input()
        if not 'B' in s:
            continue
        if starti == -1:
            starti = i
            a = [int(pos) for pos,char in enumerate(s) if char=='B']
            centerj = min(a) + (max(a)-min(a))/2
            a = centerj - s.index('B')
            centeri = starti + a

    print('{} {}'.format(int(centeri+1), int(centerj+1)))



if __name__ == '__main__':
    main()

```