#include <iostream>
#include <list>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <vector>
#include <algorithm>
#include <map>
#include <chrono>
#include <math.h>
using namespace std;

using lli = long long int;
using Vint = std::vector<int>;
using Vlli = std::vector<lli>;
using Wint = std::vector<Vint>;
using Wlli = std::vector<Vlli>;
using Vbool = std::vector<bool>;
using pii = std::pair<int, int>;
using pll = std::pair<lli, lli>;
template <class T>
using Vec = std::vector<T>;

constexpr int MOD = 1e9 + 7;
constexpr int INFi = 2e9 + 1;
constexpr lli INFl = (lli)(9e18) + 1;
const vector<pii> DXDY = {std::make_pair(1, 0), std::make_pair(-1, 0), std::make_pair(0, 1), std::make_pair(0, -1)};
constexpr char BR = '\n';

#define FOR(i, a, b) for(int (i) = (a); (i) < (b); (i)++)
#define FOReq(i, a, b) for(int (i) = (a); (i) <= (b); (i)++)
#define rFOR(i, a, b) for(int (i) = (b); (i) >= (a); i--)
#define FORstep(i, a, b, step) for(int (i) = (a); i < (b); i += (step))
#define REP(i, n) FOR(i, 0, n)
#define rREP(i, n) rFOR(i, 0, (n-1))
#define vREP(ele, vec) for(auto &(ele) : (vec))
#define vREPcopy(ele, vec) for(auto (ele) : (vec))
#define SORT(A) std::sort((A).begin(), (A).end())
#define rSORT(A) std::sort((A).rbegin(), (A).rend())
// 座標圧縮 (for vector) : ソートしてから使うのが一般的 ; SORT(A) => COORDINATE_COMPRESSION(A)
#define COORDINATE_COMPRESSION(A) (A).erase(unique((A).begin(),(A).end()),(A).end())



template <class T> inline int argmin(std::vector<T> vec){return min_element(vec.begin(), vec.end()) - vec.begin();}
template <class T> inline int argmax(std::vector<T> vec){return max_element(vec.begin(), vec.end()) - vec.begin();}
template <class T> inline void chmax(T &a, T b){a = max(a, b);}
template <class T> inline void chmin(T &a, T b){a = min(a, b);}
inline int BitI(int k){return 1 << k;}
inline lli BitL(int k){return 1L << k;}
inline int toInt(string &s){int res = 0; for(char a : s) res = 10 * res + (a - '0'); return res;}
inline int toInt(const string s){int res = 0; for(char a : s) res = 10 * res + (a - '0'); return res;}
inline long long int toLong(string &s){lli res = 0; for(char a : s) res = 10 * res + (a - '0'); return res;}
inline long long int toLong(const string s){lli res = 0; for(char a : s) res = 10 * res + (a - '0'); return res;}
template <class T> inline std::string toString(T n){
  if(n == 0) return "0";
  std::string res = "";
  if(n < 0){n = -n;while(n != 0){res += (char)(n % 10 + '0'); n /= 10;}
  std::reverse(res.begin(), res.end()); return '-' + res;}
  while(n != 0){res += (char)(n % 10 + '0'); n /= 10;} std::reverse(res.begin(), res.end()); return res;
}

// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

using Vbool = std::vector<bool>;

lli power_mod(int a, int n, int mod){
  if(n == 0) return 1;
  lli prev = power_mod(a, n / 2, mod);
  if(n % 2 == 0) return (prev * prev) % mod;
  return (((prev * prev) % mod) * a) % mod;
}

inline lli getInv(int a, int mod){
  return  power_mod(a, mod - 2, mod);
}

int main(void){
  int n; scanf("%d", &n);
  Vbool hasDone(n, false);
  Wint Tree(n, Vint(0));
  lli rrr = 1;
  for(int i = 2; i <= n; i++) rrr = (rrr * i) % MOD;
  REP(i, n-1){
    int a, b;
    scanf("%d%d", &a, &b); a--; b--;
    Tree[a].emplace_back(b);
    Tree[b].emplace_back(a);
  }
  std::queue<int> Q; Q.push(0); hasDone[0] = true;
  const lli inv_n = getInv(n, MOD), inv_two = getInv(2, MOD);
  int cnt = 0; lli res = 0;
  int faze = 1;
  while(not Q.empty()){
    const int sz = Q.size();
    REP(_, sz){
      int idx = Q.front(); Q.pop();
      vREP(ele, Tree[idx]){
        if(not hasDone[ele]){ Q.push(ele); hasDone[ele] = true;}
      }
    }
    lli united = sz * rrr * getInv(faze, MOD)  % MOD;
    res = (res + united) % MOD;
    cnt += sz;
    faze++;
    //cout << united << BR;
  }
  cout << res << BR;
  return 0;
}