#include <bits/stdc++.h>

using namespace std;

long int fact(long int x){
    if(x==1)
    return 1;
    else 
        return ((x%((10^9)+7))*(fact(x-1)%((10^9)+7)));
}
long countArray(int n, int k, int x) {
  return (fact(k)/((fact(n-2)%((10^9)+7))*(fact(k-n+2)%((10^9)+7))));
}

int main() {
    int n;
    int k;
    int x;
    cin >> n >> k >> x;
    long answer = countArray(n, k, x);
    cout << answer << endl;
    return 0;
}