#include<bits/stdc++.h>
using namespace std;
#define int ll
#define ll long long

#define I32_MAX 2147483647
#define I64_MAX 9223372036854775807LL
#define I64_MAX2 1223372036854775807LL
#define INF I64_MAX2
#define MOD 1000000007
// #define MOD 998244353 
#define MEM_SIZE 100010
#define DEBUG_OUT true
#define ALL(x) (x).begin(), (x).end()

template<typename T> void DEBUG(T e){if(DEBUG_OUT == false)return; std::cout << e <<" ";}
template<typename T> void DEBUG(const std::vector<T>& v){if(DEBUG_OUT == false)return;for(const auto& e : v){std::cout<< e << " "; } std::cout << std::endl;}
template<typename T> void DEBUG(const std::vector<std::vector<T> >& vv){if(DEBUG_OUT == false)return;for(const auto& v : vv){ DEBUG(v); } }
template<class T,class... Ts> void DEBUG(T d, Ts... e){if(DEBUG_OUT == false)return;DEBUG(d);DEBUG(e...);}
template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; abort();}}
template< typename T1, typename T2 > inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
template< typename T1, typename T2 > inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }

void DFS(int V,int P, int D,vector<vector<int> > &GRAPH ,vector<int> & data)
{
  if(P != -1)
  {
    data[V] = data[P] + D;
    data[V] %= MOD;
  }
  for (auto &&nv : GRAPH[V])
  {
    DFS(nv,V,D+1,GRAPH,data);
  }
  return;
}
void solve(void)
{
  int N,M;
  cin>>N;
  M = N -1;
  vector<vector<int> > GRAPH (N);
  vector<int> P(N,0);
  for (int i = 0; i < M; i++)
  {
    int A,B;
    cin>>A>>B;
    A--;B--;
    GRAPH[A].push_back(B);
    P[B]++;
  }
  int root = -1;
  for (int i = 0; i < N; i++)
  {
    if(P[i] == 0)root = i;
  }
  vector<int> data (N,0);
  DFS(root,-1,0,GRAPH,data);
  int res = 0;
  for (auto &&x :  data)
  {
    res += x;
    res %= MOD;
  }
  // DEBUG(data);
  cout<<res<<endl;
  

  
  
  
  return;
}
int32_t main(int32_t argc, const char *argv[])
{
  std::ios::sync_with_stdio(false);
  std::cin.tie(0);

  std::cout << std::fixed;
  std::cout << std::setprecision(11);
  solve();

  return 0;
}