fn main() {
    let stdin = std::io::stdin();
    let mut line = String::new();
    stdin.read_line(&mut line).unwrap();
    let h = line
        .split_whitespace()
        .next()
        .unwrap()
        .parse::<usize>()
        .unwrap();
    let mut map: Vec<Vec<u8>> = vec![vec![]; h];
    for i in 0..h {
        let mut line = String::new();
        stdin.read_line(&mut line).unwrap();
        map[i] = line.trim().as_bytes().to_vec();
    }
    let w = map[0].len();
    let mut result: Vec<Vec<Vec<i64>>> = vec![vec![vec![0; w + h + 1]; w]; h];
    result[0][0][1] = 1;
    for i in 0..h {
        for j in 0..w {
            for current in 0..=w + h {
                if result[i][j][current] == 0 {
                    continue;
                }
                if j + 1 < w {
                    if map[i][j + 1] == b'o' {
                        result[i][j + 1][current + 1] += result[i][j][current];
                    } else if map[i][j + 1] == b'x' && current > 0 {
                        result[i][j + 1][current - 1] += result[i][j][current];
                    }
                }
                if i + 1 < h {
                    if map[i + 1][j] == b'o' {
                        result[i + 1][j][current + 1] += result[i][j][current];
                    } else if map[i + 1][j] == b'x' && current > 0 {
                        result[i + 1][j][current - 1] += result[i][j][current];
                    }
                }
            }
        }
    }
    println!("{}", result[h - 1][w - 1].iter().sum::<i64>());
}