def add(x, y):
    z = [0] * max(len(x), len(y))
    for i in range(len(z)):
        if i < len(x):
            z[i] += x[i]
        if i < len(y):
            z[i] += y[i]
    return z


def main():
    n, m = map(int, input().split())
    a = [input() for _ in range(n)]
    d = [[None] * m for _ in range(n)]

    d[0][0] = [0, 1]
    for i in range(n):
        for j in range(m):
            if i == 0 and j == 0:
                continue
            d[i][j] = []
            if a[i][j] == '#':
                continue
            if i > 0:
                d[i][j] = add(d[i][j], d[i-1][j])
            if j > 0:
                d[i][j] = add(d[i][j], d[i][j-1])
            if a[i][j] == 'o':
                d[i][j] = [0] + d[i][j]
            else:
                d[i][j] = d[i][j][1:]
    print(sum(d[n-1][m-1]))


if __name__ == '__main__':
    main()