#![allow(non_snake_case, unused_imports, unused_must_use)]
use std::io::{self, prelude::*};
use std::str;

fn main() {
    let (stdin, stdout) = (io::stdin(), io::stdout());
    let mut scan = Scanner::new(stdin.lock());
    let mut out = io::BufWriter::new(stdout.lock());

    macro_rules! input {
        ($T: ty) => {
            scan.token::<$T>()
        };
        ($T: ty, $N: expr) => {
            (0..$N).map(|_| scan.token::<$T>()).collect::<Vec<_>>()
        };
    }

    let H = input!(usize);
    let W = input!(usize);

    let A = (0..H)
        .map(|_| input!(String).chars().collect::<Vec<_>>())
        .collect::<Vec<_>>();
    let mut ans = 0_usize;

    for s in 0..1usize << (H + W - 2) {
        let mut hcnt = 0;
        let mut wcnt = 0;

        for i in 0..H + W - 2 {
            if (s >> i) & 1 == 1 {
                hcnt += 1;
            } else {
                wcnt += 1;
            }
        }

        if !(hcnt == H - 1 && wcnt == W - 1) {
            continue;
        }

        let mut jewelry = 1;
        let mut ny = 0;
        let mut nx = 0;
        let mut isok = true;

        for i in 0..H + W - 2 {
            if (s >> i) & 1 == 1 {
                ny += 1;

                if A[ny][nx] == 'o' {
                    jewelry += 1;
                } else if A[ny][nx] == 'x' {
                    jewelry -= 1;
                } else {
                    isok = false;
                }
            } else {
                nx += 1;

                if A[ny][nx] == 'o' {
                    jewelry += 1;
                } else if A[ny][nx] == 'x' {
                    jewelry -= 1;
                } else {
                    isok = false;
                }
            }

            if jewelry < 0 {
                isok = false;
            }
        }

        if isok {
            ans += 1;
        }
    }

    writeln!(out, "{}", ans);
}

struct Scanner<R> {
    reader: R,
    buf_str: Vec<u8>,
    buf_iter: str::SplitWhitespace<'static>,
}
impl<R: BufRead> Scanner<R> {
    fn new(reader: R) -> Self {
        Self {
            reader,
            buf_str: vec![],
            buf_iter: "".split_whitespace(),
        }
    }
    fn token<T: str::FromStr>(&mut self) -> T {
        loop {
            if let Some(token) = self.buf_iter.next() {
                return token.parse().ok().expect("Failed parse");
            }
            self.buf_str.clear();
            self.reader
                .read_until(b'\n', &mut self.buf_str)
                .expect("Failed read");
            self.buf_iter = unsafe {
                let slice = str::from_utf8_unchecked(&self.buf_str);
                std::mem::transmute(slice.split_whitespace())
            }
        }
    }
}