#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)

const long long MOD = 1e9 + 7;
int n;
vector<int> edges[200000];
int depth[200000+1];
long long f[200000+1];
long long g[200000+1];

long long modpow(long long x, long long p, long long mod) {
  long long ret = 1;
  while (p) {
    if (p & 1)
      ret = ret * x % mod;
    x = x * x % mod;
    p >>= 1;
  }
  return ret;
}

long long comb(int n, int k) {
  return f[n] * g[n-k] % MOD * g[k] % MOD;
}

void dfs(int v, int par = -1, int d = 1) {
  ++depth[d];
  for (int w: edges[v]) {
    if (w != par)
      dfs(w, v, d+1);
  }
}

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  f[0] = g[0] = 1;
  for (int i = 1; i <= 200000; i++) {
    f[i] = i * f[i-1] % MOD;
    g[i] = modpow(f[i], MOD-2, MOD);
  }
  
  cin >> n;
  REP (i, n-1) {
    int u, v;
    cin >> u >> v;
    --u, --v;
    edges[u].push_back(v);
    edges[v].push_back(u);
  }

  dfs(0);

  long long ret = 0;
  for (int d = 1; d <= n; d++) {
    long long tmp = depth[d] * comb(n, d) % MOD * f[d-1] % MOD * f[n-d] % MOD;
    ret = (ret + tmp) % MOD;
  }
  cout << ret << endl;
  
  return 0;
}