import java.util.*; import java.io.*; public class Main { static ArrayList> graphIn = new ArrayList<>(); static ArrayList> graphOut = new ArrayList<>(); static int[] inCounts; static int[] outCounts; static final int MOD = 1000000007; public static void main (String[] args) throws Exception { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int n = Integer.parseInt(br.readLine()); for (int i = 0; i < n; i++) { graphIn.add(new ArrayList<>()); graphOut.add(new ArrayList<>()); } int[] ins = new int[n - 1]; int[] outs = new int[n - 1]; for (int i = 0; i < n - 1; i++) { String[] line = br.readLine().split(" ", 2); ins[i] = Integer.parseInt(line[0]) - 1; outs[i] = Integer.parseInt(line[1]) - 1; graphOut.get(ins[i]).add(outs[i]); graphIn.get(outs[i]).add(ins[i]); } inCounts = new int[n]; outCounts = new int[n]; long ans = 0; for (int i = 0; i < n - 1; i++) { ans += (long)getInCount(ins[i]) * getOutCount(outs[i]) % MOD; ans %= MOD; } System.out.println(ans); } static int getInCount(int idx) { if (inCounts[idx] == 0) { inCounts[idx] = 1; for (int x : graphIn.get(idx)) { inCounts[idx] += getInCount(x); } } return inCounts[idx]; } static int getOutCount(int idx) { if (outCounts[idx] == 0) { outCounts[idx] = 1; for (int x : graphOut.get(idx)) { outCounts[idx] += getOutCount(x); } } return outCounts[idx]; } }