#include <bits/stdc++.h>
using namespace std;
const int mod = 1e9;

int memo[1010][1010];
int C(int n, int k) {
    if (memo[n][k] != -1)
        return memo[n][k];
    if (n == 0) {
        return 1;
    }
    int ret = 0;
    if (k > 0)
        ret += C(n - 1, k - 1);
    if (k < n)
        ret += C(n - 1, k);
    return memo[n][k] = ret % mod;
}


int main() {
    string S;
    cin >> S;

    map<char, int> mp;
    for (auto& c : S) {
        mp[c]++;
    }

    for (int i = 0; i < 1001; i++) {
        for (int j = 0; j < 1001; j++) {
            memo[i][j] = -1;
        }
    }

    int ans = 1;
    int res = S.size();
    for (auto& p : mp) {
        (ans *= C(res, p.second)) %= mod;
        res -= p.second;
    }

    ((ans += mod) -= 1) %= mod;
    cout << ans << endl;
}