#![allow(unused_imports)]
use std::cmp::*;
use std::collections::*;
use std::io::Write;
use std::ops::Bound::*;

#[allow(unused_macros)]
macro_rules! debug {
    ($($e:expr),*) => {
        #[cfg(debug_assertions)]
        $({
            let (e, mut err) = (stringify!($e), std::io::stderr());
            writeln!(err, "{} = {:?}", e, $e).unwrap()
        })*
    };
}

fn main() {
    let t = read::<usize>();
    for _ in 0..t {
        let v = read_vec::<i64>();
        let (mut a, b) = (v[0], v[1]);
        let mut cur = 1;
        loop {
            if a % cur != 0 {
                cur /= 2;
                break;
            }
            cur *= 2;
        }

        let mut answers = vec![];
        while a + cur <= b {
            a += cur;
            answers.push(cur);
            cur *= 2;
        }

        while a < b {
            if a + cur > b {
                cur /= 2;
            } else {
                a += cur;
                answers.push(cur);
                cur /= 2;
            }
        }
        assert_eq!(a, b);

        println!("{}", answers.len());
        for ans in answers {
            print!("{} ", ans);
        }
        println!("");
    }
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}