#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using ll =  long long ;
using P = pair<int,int> ;
const ll INF = 1e14;
const int MOD = 1000000007;
int n = 200005;
vector<vector<int>> tree(n);
vector<int> depth(n,0);

void dfs(int i,int p=-1,int d=0){
    depth[d] ++;
    for(int c:tree[i]){
        if(c==p) continue;
        dfs(c,i,d+1);
    }
}

long long modpow(long long a, long long b,long long mod){
        bitset<30> bit(b);
        string s = bit.to_string();
        long long ret = 1;
        for (int i = 0;i< s.length(); ++i){
                ret = (ret * ret) % mod;
                if(s[i]-'0') ret = (ret * a) % mod;
        }
        return ret;
}

long long inverse(long long x,long long mod){
    return modpow(x,mod-2,mod);
}

int main(){
    cin >> n;
    rep(i,n-1){
        int a,b;
        cin >> a >> b;
        --a;--b;
        tree[a].push_back(b);
        tree[b].push_back(a);
    }
    dfs(0);
    ll ans = 0;
    ll n_p = 1;
    for(ll i=1;i<=n;i++) n_p = (n_p * i)%MOD;
    for(ll i=0;i<n;i++){
        ans = (ans + n_p * (inverse(i+1,MOD) * depth[i])%MOD)%MOD;
    }
    cout << ans << endl;
    return 0;
}