local mfl, mce = math.floor, math.ceil
local mod = 1000000007
local function bmul(x, y)
  local x1, y1 = mfl(x / 31623), mfl(y / 31623)
  local x0, y0 = x - x1 * 31623, y - y1 * 31623
  return (x1 * y1 * 14122 + (x1 * y0 + x0 * y1) * 31623 + x0 * y0) % mod
end
local function badd(a, b) return (a + b) % mod end

local function modpow(src, pow)
  local res = 1
  while 0 < pow do
    if pow % 2 == 1 then
      res = bmul(res, src)
      pow = pow - 1
    end
    src = bmul(src, src)
    pow = mfl(pow / 2)
  end
  return res
end

--[[

H = W + K

f(H, W) = 24 * g(H, W)
g(H, W) = 2^(H-3) + 2^(W-3) + g(H - 1, W - 1)
g(K, 0) = 2^K

g(H, W)
  = 2^(H-3) + 2^(W-3) + 2^(H-4) + 2^(W-4) + ... + 2^(H-W) + 2^0 + 2^K
<2^K = 2^(H-W) = 2^(H-W-1) + 2^(H-W-2) + ... + 2^0 + 1>
  = 2^(H-2) + 2^(W-2) - 1

]]

local h, w = io.read("*n", "*n")
local v = (modpow(2, h - 2) + modpow(2, w - 2) - 1 + mod) % mod
print(bmul(24, v))