#include <bits/stdc++.h>
using namespace std;
#include <atcoder/modint>
using mint = atcoder::modint1000000007;

array<int, 26> cnt;
int main() {
	string s;
	cin >> s;
	int n = s.size();
	vector<mint> fac(n + 1, 1);
	for(int i = 1; i <= n; i++) fac[i] = i * fac[i - 1];
	for(const auto &c : s) cnt[c - 'a']++;
	mint res = fac[n];
	for(auto &v : cnt) res /= fac[v];
	cout << res.val() << endl;
	return 0;
}