#include<bits/stdc++.h>
using namespace std;
const int M = 1000000007;

long long powmod(long long a, long long b) {
    if (b == 0) return 1;
    long long t = powmod(a, b / 2);
    t = t * t % M;
    if (b & 1) t = t * a % M;
    return t;
}

long long inv(long long a) {
    return powmod(a, M - 2);
}

vector<long long> fact;

long long comb(int n, int k) {
    if (k < 0 || k > n) return 0;
    return fact[n] * inv(fact[k]) % M * inv(fact[n - k]) % M;
}

int main() {
    int n;
    cin >> n;
    fact = vector<long long>(n * 2);
    fact[0] = 1;
    for (int i = 1; i < n * 2; ++i) fact[i] = fact[i - 1] * i % M;

    vector<int> cnt(n);
    for (int i = 0; i < n - 1; ++i) {
        int a, b;
        cin >> a >> b;
        --a;
        --b;
        ++cnt[a];
        ++cnt[b];
    }
    int k = 0;
    for (int i = 1; i < n; ++i) if (cnt[i] == 1) ++k;

    cout << comb(n - 1, k) * comb(n - 1, k - 1) % M * inv(n - 1) % M << "\n";
    return 0;
}