#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <cassert>
#include <fstream>
#define popcount __builtin_popcount
using namespace std;
typedef long long int ll;
typedef pair<int, int> P;
const ll MOD=1e9+7;
ll powmod(ll a, ll k){
    ll ap=a, ans=1;
    while(k){
        if(k&1){
            ans*=ap;
            ans%=MOD;
        }
        ap=ap*ap;
        ap%=MOD;
        k>>=1;
    }
    return ans;
}
ll inv(ll a){
	return powmod(a, MOD-2);
}
ll f[1500001], invf[1500001];
void fac(int n){
    f[0]=1;
    for(ll i=1; i<=n; i++) f[i]=f[i-1]*i%MOD;
    invf[n]=inv(f[n]);
    for(ll i=n-1; i>=0; i--) invf[i]=invf[i+1]*(i+1)%MOD;
}
ll comb(int x, int y){
    if(x<y) return 0;
    return f[x]*invf[y]%MOD*invf[x-y]%MOD;
}
vector<int> g[200020];
int d[200020];
bool used[200020];
void dfs(int x){
    used[x]=1;
    for(auto y:g[x]){
        if(!used[y]){
            d[y]=d[x]+1;
            dfs(y);
        }
    }
}
int main()
{
    int n; cin>>n;
    for(int i=0; i<n-1; i++){
        int u, v; cin>>u>>v; u--; v--;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    d[0]=1;
    dfs(0);
    fac(n);
    ll ans=0;
    for(int i=0; i<n; i++){
        ans+=comb(n, d[i])*f[n-d[i]]%MOD;
        ans%=MOD;
    }
    cout<<ans<<endl;
    return 0;
}