#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<pii,int> ppii;
typedef pair<int,pii> pipi;
typedef pair<ll,ll> pll;
typedef pair<ll,pll> plpl;
typedef tuple<ll,ll,ll> tl;
ll mod=1000000007;
ll inf=1000000000000000000;
#define rep(i,m,n) for(int i=m;i<n;i++)
#define rrep(i,n,m) for(int i=n;i>=m;i--)
ll lmax(ll a,ll b){
    if(a<b)return b;
    else return a;
}
ll lmin(ll a,ll b){
    if(a<b)return a;
    else return b;
}
int dh[4]={-1,1,0,0};
int dw[4]={0,0,1,-1};
ll gya[200010];
ll kai[200010];
ll beki(ll n,ll k){
    ll ret=1;
    ll now=n;
    while(k>0){
        if(k%2==1){
            ret*=now;
            ret%=mod;
        }
        now*=now;
        now%=mod;
        k/=2;
    }
    return ret;
}
ll gyaku(ll n){
    return beki(n,mod-2);
}
void nckinit(ll n){
    gya[0]=1;
    gya[1]=1;
    for(int i=2;i<=n;i++){
        gya[i]=gya[i-1]*gyaku(i);
        gya[i]%=mod;
    }
    kai[0]=1;
    kai[1]=1;
    for(int i=2;i<=n;i++){
        kai[i]=kai[i-1]*i;
        kai[i]%=mod;
    }
}
ll nck(ll n,ll k){
    if(k<0)return 0;
    if(k==0||n==k)return 1;
    ll ret=kai[n];
    ret*=gya[n-k];
    ret%=mod;
    ret*=gya[k];
    ret%=mod;
    return ret;
}
ll npk(ll n,ll k){
    if(k<0)return 0;
    if(k==0)return 1;
    ll ret=kai[n];
    ret*=gya[n-k];
    ret%=mod;
    return ret;
}
int main(){
    int n;cin>>n;
    vector<int> v[n+1];
    rep(i,0,n-1){
        int a,b;cin>>a>>b;
        v[a].push_back(b);
        v[b].push_back(a);
    }
    queue<int> q;
    q.push(1);
    queue<int> d;
    d.push(1);
    bool used[n+1];fill(used,used+n+1,false);
    used[1]=true;
    ll ans=0;
    nckinit(n+1);
    while(q.size()>0){
        int now=q.front();
        ll dis=d.front();
        q.pop();d.pop();
        ll sum=nck(n,dis)*kai[n-dis];
        sum%=mod;
        sum*=kai[dis-1];
        sum%=mod;
        ans+=sum;
        //cout<<sum<<" ";
        ans%=mod;
        rep(i,0,v[now].size()){
            int ne=v[now][i];
            if(used[ne])continue;
            used[ne]=true;
            q.push(ne);
            d.push(dis+1);
        }
    }
    cout<<ans<<endl;
}