MOD = 10 ** 9 + 7

n = int(input())

g = [[] for _ in range(n)]
deg = [0 for _ in range(n)]
for _ in range(n - 1):
  a, b = map(int, input().split())
  a -= 1
  b -= 1
  g[a].append(b)
  deg[b] += 1

src = None
for v in range(n):
  if deg[v] == 0:
    src = v
    break

dist = [None for _ in range(n)]
dist[src] = 0
par = [None for _ in range(n)]
dp = [0 for _ in range(n)]
ans = 0
st = [~ src, src]
while len(st) > 0:
  cur = st.pop()
  if cur >= 0:
    for nxt in g[cur]:
      dist[nxt] = dist[cur] + 1
      par[nxt] = cur
      st.append(~ nxt)
      st.append(nxt)
  else:
    dp[~ cur] += 1
    if not par[~ cur] is None:
      dp[par[~ cur]] += dp[~ cur]
    ans = (ans + dp[~ cur] * dist[~ cur]) % MOD

print(ans)