use proconio::input;

fn main(){
    input!{
        _h: i32,
        _w: i32,
        a: i32,
        b: i32,
        r1: i32,
        c1: i32,
        r2: i32,
        c2: i32,
        p: i32,
        q: i32,
    }

    let mut ans = i32::MAX;
    for x in r1..=r2{
        for y in c1..=c2{
            let mut xs = [a, p, x];
            let mut ys = [b, q, y];
            xs.sort();
            ys.sort();
            ans = ans.min(2*(xs[2]+ys[2]-xs[0]-ys[0]));
        }
    }

    println!("{}", ans);
}