#include <bits/stdc++.h>
using namespace std;
#define int long long
const int MOD=1e9+7;
int pw(int n,int k){
  if(k<0)return pw(n,k+MOD-1);
  int res=1;
  while(k){
    if(k&1)res*=n;res%=MOD;
    n*=n;n%=MOD;
    k>>=1;
  }
  return res;
}
std::vector<int> Factorial(5e6),Finverse(5e6);
inline void Cinit(){// limit is 5e6 /// write pw /// this takes 792ms at AtCoder
  Factorial[0]=1;
  for(int i=1;i<5e6;i++)Factorial[i]=Factorial[i-1]*i%MOD;
  for(int i=0;i<5e6;i++)Finverse[i]=pw(Factorial[i],MOD-2);
}
int nCk(int n,int k){
  if(n<k)return 0;if(k<0)return 0;
  if(!Factorial[0])Cinit();
  int res=Factorial[n];
  res*=Finverse[k];res%=MOD;
  res*=Finverse[n-k];res%=MOD;
  return res;
}
int n,m,k;

int f(int a){
  if(a&1)return 0;
  a>>=1;
  int res=nCk(n,a)*nCk(m,a)%MOD;
  res*=Factorial[n-1]*Factorial[m-1]%MOD;res%=MOD;
  return res*a%MOD;
}

signed main(){
  cin>>n>>m>>k;
  assert(1<=n);
  assert(1<=m);
  assert(n<=100000);
  assert(m<=100000);
  assert(0<=k);
  assert(k<=200000);
  assert(k<=n+m);
  int ans=0;
  for(int i=0;i<=n+m-k;i++)ans+=f(i),ans%=MOD;
  cout<<ans<<endl;
}