H,W = map(int,input().split())
A = [input() for i in range(H)]

from itertools import combinations

ans = 0
for ptn in combinations(range(H+W-2), H-1):
    sptn = set(ptn)
    i = j = 0
    h = 1
    for k in range(H+W-2):
        if k in sptn:
            i += 1
        else:
            j += 1
        if A[i][j]=='#': break
        if A[i][j]=='o':
            h += 1
        else:
            h -= 1
            if h < 0:
                break
    else:
        ans += 1
print(ans)