use std::io::Write;
use std::collections::*;

fn run() {
    input! {
        t: usize,
        ask: [[(i64, i64); 2]; t],
    }
    let out = std::io::stdout();
    let mut out = std::io::BufWriter::new(out.lock());
    for ask in ask {
        let (s, t) = (ask[0], ask[1]);
        let mut z = vec![0];
        for &v in [s.0, s.1, t.0, t.1].iter() {
            z.push(v - 1);
            z.push(v);
            z.push(v);
        }
        z.sort();
        z.dedup();
        let inf = std::i64::MAX / 10;
        let mut dp = vec![vec![inf; z.len()]; z.len()];
        let a = z.iter().position(|z| *z == s.0).unwrap();
        let b = z.iter().position(|z| *z == s.1).unwrap();
        dp[a][b] = 0;
        let mut h = std::collections::BinaryHeap::new();
        h.push((0, a, b));
        while let Some((d, a, b)) = h.pop() {
            let d = -d;
            if d > dp[a][b] {
                continue;
            }
            if a > 0 && b > 0 {
                for &(x, y) in [(0, b), (a, 0)].iter() {
                    if dp[x][y].chmin(d + 1) {
                        h.push((-dp[x][y], x, y));
                    }
                }
            }
            if a + 1 < z.len() && a + 1 != b && dp[a + 1][b].chmin(d + z[a + 1] - z[a]) {
                h.push((-dp[a + 1][b], a + 1, b));
            }
            if b + 1 < z.len() && b + 1 != a && dp[a][b + 1].chmin(d + z[b + 1] - z[b]) {
                h.push((-dp[a][b + 1], a, b + 1));
            }
        }
        let a = z.iter().position(|z| *z == t.0).unwrap();
        let b = z.iter().position(|z| *z == t.1).unwrap();
        writeln!(out, "{}", dp[a][b]).ok();
    }
}

fn main() {
    run();
}

// ---------- begin input macro ----------
// reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
#[macro_export]
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

#[macro_export]
macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};
    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

#[macro_export]
macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };
    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };
    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };
    ($iter:expr, bytes) => {
        read_value!($iter, String).bytes().collect::<Vec<u8>>()
    };
    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };
    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}
// ---------- end input macro ----------
// ---------- begin chmin, chmax ----------
pub trait ChangeMinMax {
    fn chmin(&mut self, x: Self) -> bool;
    fn chmax(&mut self, x: Self) -> bool;
}

impl<T: PartialOrd> ChangeMinMax for T {
    fn chmin(&mut self, x: Self) -> bool {
        *self > x && {
            *self = x;
            true
        }
    }
    fn chmax(&mut self, x: Self) -> bool {
        *self < x && {
            *self = x;
            true
        }
    }
}
// ---------- end chmin, chmax ----------