#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll, ll> P;

#define fi first
#define se second
#define repl(i,a,b) for(ll i=(ll)(a);i<(ll)(b);i++)
#define rep(i,n) repl(i,0,n)
#define all(x) (x).begin(),(x).end()
#define dbg(x) cout<<#x"="<<x<<endl
#define mmax(x,y) (x>y?x:y)
#define mmin(x,y) (x<y?x:y)
#define maxch(x,y) x=mmax(x,y)
#define minch(x,y) x=mmin(x,y)
#define uni(x) x.erase(unique(all(x)),x.end())
#define exist(x,y) (find(all(x),y)!=x.end())
#define bcnt __builtin_popcountll

#define INF 1e16
#define mod 1000000007

ll fac[200010],finv[200010];
ll comb(ll n,ll r){
  if(n<0||r<0||n<r)return 0;
  else return (fac[n]*finv[n-r]%mod)*finv[r]%mod;
}

ll mod_pow(ll a,ll n){
  ll res=1;
  while(n>0){
    if(n&1)res=res*a%mod;
    a=a*a%mod;
    n>>=1;
  }
  return res;
}

ll n;
vector<ll> g[200010];
ll res=0;

void dfs(ll v,ll pre,ll d){
  for(ll nv : g[v]){
    if(nv==pre)continue;
    dfs(nv,v,d+1);
  }
  ll add=fac[d]*comb(n,d+1)%mod;
  add*=fac[n-1-d]; add%=mod;
  res+=add; res%=mod;
}

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

  fac[0]=1;
  rep(i,200000)fac[i+1]=fac[i]*(i+1)%mod;
  rep(i,200001)finv[i]=mod_pow(fac[i],mod-2);

  cin>>n;
  rep(i,n-1){
    ll a,b;
    cin>>a>>b;
    a--;b--;
    g[a].push_back(b);
    g[b].push_back(a);
  }
  dfs(0,-1,0);

  cout<<res<<endl;

  return 0;
}