MOD = 10 ** 9 + 7
N = int(input())
UV = [list(map(int, input().split())) for _ in range(N - 1)]
E = [[] for _ in range(N)]
factn = 1
for i in range(1, N + 1):
    factn *= i
    factn %= MOD

for u, v in UV:
    u -= 1
    v -= 1
    E[u].append(v)
    E[v].append(u)

def dfs(u, p, g):
    G[g] += 1
    for v in E[u]:
        if v != p:
            dfs(v, u, g + 1)

G = [0] * N
dfs(0, -1, 0)
ans = 0
for i, g in enumerate(G, start = 1):
    ans += factn * pow(i,MOD-2,MOD) * g
    ans %= MOD
print(ans)