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

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

signed main(){

  int n;
  cin>>n;
  vector<vector<int>> adj(n);
  vector<int> par(n,-1);
  rep(i,n-1){
    int a,b;
    cin>>a>>b;
    a--;b--;
    adj[a].emplace_back(b);
    par[b] = a;
  }
  
  int root = -1;
  rep(i,n)if(par[i]==-1)root=i;
  // pars,childs
  constexpr int64_t mod = 1e9+7;
  int64_t ans = 0;
  auto dfs = [&](auto&&dfs,int cur,int pnum)->int64_t{
    int64_t cnum = 0;
    for(auto to:adj[cur]){
      int64_t tmp = dfs(dfs,to,pnum+1);
      cnum += tmp;
    }
    //cout<<cur<<" "<<pnum<<" "<<cnum<<endl;
    ans += pnum*cnum;
    ans %= mod;
    return cnum+1;
  };
  dfs(dfs,root,1);
  cout<<(ans)<<endl;

}