#include<iostream>
#include<cstdio>
#include<vector>
#define N 200000
#define mod 1000000007
using namespace std;
int read()
{
	char c=0;
	int sum=0;
	while (c<'0'||c>'9') c=getchar();
	while ('0'<=c&&c<='9') sum=sum*10+c-'0',c=getchar();
	return sum;
}
int n,m,fac[N+1],ans=1;
vector<int>E[N+1];
bool used[N+1];
void add(int x,int y)
{
	E[x].push_back(y),E[y].push_back(x);
	return;
}
int main()
{
	int x,y;
	fac[0]=1;
	for (int i=1;i<=N;++i) fac[i]=1ll*fac[i-1]*i%mod;
	n=read(),m=read();
	for (int i=1;i<=n-1;++i) x=read(),y=read(),add(x,y);
	for (int i=1;i<=n;++i) ans=1ll*ans*fac[E[i].size()]%mod;
	printf("%lld\n",1ll*ans*n%mod);
	return 0;
}