import java.util.*;

public class Main {
    static ArrayList<ArrayList<Integer>> graph = new ArrayList<>();
    static long ans = 0;
    static final int MOD = 1000000007;
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        TreeSet<Integer> unused =  new TreeSet<>();
        for (int i = 0; i < n; i++) {
            graph.add(new ArrayList<>());
            unused.add(i);
        }
        for (int i = 0; i < n - 1; i++) {
            int a = sc.nextInt() - 1;
            int b = sc.nextInt() - 1;
            graph.get(a).add(b);
            unused.remove(b);
        }
        calc(unused.first(), 0);
        System.out.println(ans);
    }
    
    static int calc(int idx, long depth) {
        int children = 1;
        for (int x : graph.get(idx)) {
            children += calc(x, depth + 1);
        }
        ans += children * depth % MOD;
        ans %= MOD;
        return children;
    }
}