T = int(input())
for _ in range(T):
    A, B = map(int, input().split())
    ans = []
    nokori = 120
    while A != B:
        while 2 * A <= B:
            ans.append(A)
            A *= 2
            nokori -= 1
            
        if B - A <= nokori:
            ans.extend([1] * (B - A))
            break
                    
        ind = 1
        while A != B:
            # print(A, B, ans, sum(ans))
            two = 2 ** ind
            # if (B - A)//(two//2) <= nokori:
            #     ans.extend([two//2] * ((B - A)//(two//2) ))
            #     break
            if A % two == 0:
                if A + A // two <= B:
                    ans.append(A // two)
                    A += A // two
                    nokori -= 1
                    ind = 1
                    break
                else:
                    ind += 1
            else:
                A += two // 2
                nokori -= 1
                ans.append(two // 2)
            
    print(len(ans))
    print(*ans)