// 41 point C region 2016 first tour

# include <set>
# include <string>
# include <iostream>

using namespace std;

int32_t check_st(string &s, set<string> &checked) {
    checked.insert(s);
    bool first = true;
    char pr = s[0];
    for (size_t i = 1; i < s.length(); i++) {
        if (s[i] != pr) {
            if (first) {
                first = false;
                pr = s[i];
            } else {
                return 0;
            }
        }
    }
    return 1;
}

int main() {
    string s;
    int32_t count = 0;
    set<string> checked;
    cin >> s;
    for (size_t i = 0; i < s.length(); i++) {
        string st_cur;
        st_cur += s[i];
        if (checked.find(st_cur) == checked.end()){
            count += check_st(st_cur, checked);
        }
        for (size_t j = i + 1; j < s.length(); j++) {
            st_cur += s[j];
            if (checked.find(st_cur) == checked.end()){
                count += check_st(st_cur, checked);
            }
        }
    }
    cout << count;
    return 0;
}