local ffi = require("ffi")
local C = ffi.C
ffi.cdef[[
long long atoll(const char*);
]]

local function lltonumber(str)
  return C.atoll(str)
end

local function solve()
  local a, b = io.read():match("(%d+) (%d+)")
  a = lltonumber(a)
  b = lltonumber(b)
  local t = {}
  while a < b do
    local diff = b - a
    local mul = 1LL
    local tgt = 1LL
    while true do
      local v = mul + b % mul
      if diff < v then break end
      tgt = mul
      mul = mul + mul
    end
    mul = 1LL
    local v = tgt + b % tgt
    b = b - v
    while 0LL < v do
      if v % 2LL == 1LL then
        table.insert(t, mul)
      end
      v = v / 2LL
      mul = mul + mul
    end
  end
  print(#t)
  for i = #t, 1, -1 do
    local str = tostring(t[i]):gsub("LL", "")
    io.write(str)
    io.write(i == 1 and "\n" or " ")
  end
end
local q = io.read("*n", "*l")
for iq = 1, q do solve() end