#include <bits/stdc++.h>

using namespace std;

#define int long long

vector<char> s;

int32_t main()
{
    ios_base::sync_with_stdio(false);

    freopen("map.in", "r", stdin);
    freopen("map.out", "w", stdout);

    string p;
    getline(cin, p);

    map<char, int> l;
    map<char, int> r;

    for (int i = 0; i < p.size(); ++i)
        if (p[i] != ' ')
            s.push_back(p[i]), l[s[i]] = 0, r[s[i]] = 0;

    for (int i = 0; i < s.size(); ++i)
        ++r[s[i]];

    --r[s[0]];

    int ans = 0;

    for (int i = 1; i < s.size() - 1; ++i)
    {
        --r[s[i]];
        ++l[s[i - 1]];

        int k = 0;

        for (char j = 'a'; j < 'z' + 1; ++j)
            k += l[j] * r[j];

        ans += k;
    }

    cout << ans;

    return 0;
}