import sys
from math import gcd

sys.setrecursionlimit(10 ** 7)
f_inf = float('inf')
mod = 10 ** 9 + 7


def resolve():
    t = int(input())
    for _ in range(t):
        a, b = map(int, input().split())

        cnt = 0
        res = []
        while a != b:
            g = gcd(a, b)
            if (a // g) % 2:
                a += g
                cnt += 1
                res.append(g)
            elif (b // g) % 2:
                b -= g
                cnt += 1
                res.append(g)
        print(cnt)
        print(*res)


if __name__ == '__main__':
    resolve()