from itertools import combinations


def main():
    H, W = map(int, input().split())
    board = [list(input()) for _ in range(H)]
    ctr = 0
    for h_dir in combinations(range(H + W - 2), H - 1):
        current = [0, 0]
        jewel = 1
        for idx in range(H + W - 2):
            if idx in h_dir:
                current = [current[0] + 1, current[1]]
            else:
                current = [current[0], current[1] + 1]
            if board[current[0]][current[1]] == "#":
                break
            if board[current[0]][current[1]] == "o":
                jewel += 1
            else:
                jewel -= 1
                if jewel < 0:
                    break
        else:
            ctr += 1
    print(ctr)


if __name__ == "__main__":
    main()