local mod = 1000000007
local mfl = math.floor

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(x, y)
  return (x + y) % mod
end
local n = io.read("*n")
local edge = {}
local len = {}
for i = 1, n do
  edge[i] = {}
  len[i] = -1
end
for i = 1, n - 1 do
  local u, v = io.read("*n", "*n")
  edge[u][v], edge[v][u] = true, true
end
len[1] = 0
local tasks = {1}
for i = 1, n do
  local src = tasks[i]
  for dst, _u in pairs(edge[src]) do
    if len[dst] < 0 then
      len[dst] = len[src] + 1
      table.insert(tasks, dst)
    end
  end
end

local f = 1
local invs = {1}
for i = 2, n do
  f = bmul(f, i)
  invs[i] = bmul(mfl(mod / i), mod - invs[mod % i])
end

local ret = 0
for i = 1, n do
  ret = badd(ret, invs[1 + len[i]])
end
print(bmul(ret, f))