#!/usr/bin/env python3
import math
from typing import *


def solve(a: int, b: int) -> List[int]:
    if a == b:
        return []

    c = []
    e = []
    if a % 2 == 1:
        a += 1
        c.append(1)
    if b % 2 == 1:
        b -= 1
        e.append(1)
    d = math.gcd(a, b)
    a //= d
    b //= d
    return c + [d * x for x in solve(a, b)] + e


# generated by online-judge-template-generator v4.7.1 (https://github.com/online-judge-tools/template-generator)
def main():
    t = int(input())
    for i in range(t):
        a, b = map(int, input().split())
        c = solve(a, b)
        print(len(c))
        print(*c)


if __name__ == '__main__':
    main()