void solve()
{
    string s;
    cin>>s;
    int n = s.size();
    int tot_str = (n*(n-1))/2;
    tot_str++;
    vector<int>hash(26, 0);
    for (auto it : s)
    {
        hash[it-'a']++;
    }
    int to_sub = 0;
    for (auto it : hash)
    {
        to_sub+=((it*(it-1))/2);
    }
    cout<<tot_str-to_sub<<endl;
}