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
s = input().split(' ')
n = int(s[0])
m = int(s[1])
def main(n,m):
    st = -1
    end = -1
    for i in range(n):
        row = input()
        ind = row.find("B")
        if ind != -1:
            if st == -1:
                st = [i,ind]
            else:
                ind = row[::-1].find('B')
                end = [i, m - ind - 1]
    if st != -1:
        if end == -1:
            return st
        else:
            x = st [0] + (end[0] - st[0])/2
            y = st [1] + (end[1] - st[1])/2
            return [int(x), int(y)]
    else:
        return [-2,-2]
res = main(n,m)
print("{} {}".format(res[0] + 1, res[1] + 1))
