import sys
input = sys.stdin.readline
N=int(input())
EDGE=[list(map(int,input().split())) for i in range(N-1)]
mod=10**9+7

E=[[] for i in range(N+1)]

for x,y in EDGE:
    E[x].append(y)
    E[y].append(x)

H=[0]*(N+1)

from collections import deque

QUE=deque([[1,1]])

while QUE:
    x,h=QUE.pop()
    if H[x]!=0:
        continue
    H[x]=h
    for to in E[x]:
        if H[to]==0:
            QUE.append([to,h+1])


from collections import Counter
C=Counter(H[1:])

FACT=[1,1]
FACT_INV=[1,1]
for i in range(2,2*10**5+1):
    FACT.append(FACT[-1]*i%mod)
    FACT_INV.append(FACT_INV[-1]*pow(i,mod-2,mod)%mod)
    
def Combi(N,K):
    return FACT[N]*FACT_INV[N-K]*FACT_INV[K]%mod

ANS=0
for c in C:
    ANS=(ANS+(Combi(N,c)*FACT[c-1]*FACT[N-c])*C[c]%mod)%mod

print(ANS)