use std::fmt::Debug;
use std::io;
use std::str::FromStr;

struct Scanner<R, W>
where
    R: io::BufRead,
    W: io::Write,
{
    reader: R,
    writer: W,
    buffer: Vec<String>,
}

impl<R: io::BufRead, W: io::Write> Scanner<R, W> {
    fn new(reader: R, writer: W) -> Self
    where
        R: io::BufRead,
        W: io::Write,
    {
        Self {
            reader,
            writer,
            buffer: Vec::new(),
        }
    }

    fn next<T: std::str::FromStr>(&mut self) -> T {
        loop {
            if let Some(token) = self.buffer.pop() {
                return token.parse().ok().expect("Failed parse");
            }
            let mut input = String::new();
            self.reader.read_line(&mut input).expect("Failed read");
            self.buffer = input.split_whitespace().rev().map(String::from).collect();
        }
    }

    #[allow(dead_code)]
    fn next_vec<T: std::str::FromStr>(&mut self) -> Vec<T>
    where
        <T as FromStr>::Err: Debug,
    {
        let mut input = String::new();
        self.reader.read_line(&mut input).expect("Failed read");
        input
            .split_whitespace()
            .rev()
            .map(|x| x.parse::<T>().unwrap())
            .collect()
    }
}

fn solve<R: io::BufRead, W: io::Write>(scan: &mut Scanner<R, W>) {
    let t = scan.next::<usize>();

    for _ in 0..t {
        let mut arr = scan.next_vec::<usize>();
        arr.sort();
        writeln!(scan.writer, "{}", arr[4] - arr[0]).ok();
    }
}

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

    solve(&mut scan);
}

#[cfg(test)]
mod tests {
    use super::*;

    fn get_output(input: &[u8]) -> String {
        let stdout = Vec::new();

        let mut scan = Scanner::new(&input[..], stdout);
        solve(&mut scan);

        let output = String::from_utf8(scan.writer).expect("what?");
        let output = output.trim();

        output.to_string()
    }

    #[test]
    fn case_0() {
        let output = get_output(
            b"
                3
                158 172 161 159 154
                1000 1000 5000 5000 5000
                46 46 46 46 46
            ",
        );

        assert_eq!(output, "18\n4000\n0".to_owned());
    }
}