def lscan; gets.split.map(&:to_i); end

def solve(a, b)
  answer = []
  step = 1
  while a < b
    if b - a == step
      answer << step
      a += step
    elsif b - a < step
      step /= 2
    elsif b - a > step*2
      if a%(step*2) == 0
        step *= 2
      else
        answer << step
        a += step
      end
    else
      answer << step
      a += step
    end
  end
  answer
end

# def check(a, b, ans)
#   p a
#   ans.each do |x|
#     abort "#{x}" unless a%x == 0
#     p a += x
#   end
#   abort `#{a} != #{b}` unless a == b
#   true
# end

gets.to_i.times do 
  a,b = lscan
  ans = solve(a, b)
  p ans.size
  puts ans*' '
  # p check(a, b, ans)
end