#[allow(dead_code)]
#[allow(unused_imports)]
fn read<T: std::str::FromStr>() -> T {
    use std::io::*;
    let stdin = stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("failed to read char") as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().expect("failed to parse token")
}
fn main(){
    let h:usize = read();
    let w:usize = read();
    let t:Vec<String> = (0..h).map(|_| read()).collect();
    let mut s = vec![Vec::new();h];
    for i in 0..h {
        let tt:Vec<_> = t[i].chars().collect();
        for j in 0..w {
            s[i].push(tt[j]);
        }
    }
    let mut dp = vec![vec![1e14 as i64;w];h];
    dp[0][0] = 0;
    for i in 0..h {
        for j in 0..w {
            for k in [0,1].iter() {
                for l in [1,0].iter() {
                    let ny = i + k;
                    let nx = j + l;
                    if ny >= h || nx >= w  || k == l{
                        continue;
                    }else{
                        if s[ny][nx] == 'k' {
                            dp[ny][nx] = std::cmp::min(dp[ny][nx], dp[i][j] + 1 + (nx + ny) as i64);
                        }else{
                            dp[ny][nx] = std::cmp::min(dp[ny][nx], dp[i][j] + 1);
                        }
                    }
                }
            }
        }
    }
//    println!("{:?}",dp);
    println!("{}", dp[h - 1][w - 1]);
}