#include <iostream>
#include <string>

int main() {
    int count = 0;
    char c;
    std::string str;
    while (std::getline(std::cin, str)) {
        for (auto iter = str.begin(); iter < str.end(); ++iter) {
            c = *iter;
            if ((*iter & 240) == 240) {     //1111 0000
                ++iter;
                ++iter;
                ++iter;
                ++count;
            } else if ((*iter & 240) == 224) {      //1110 0000
                ++iter;
                ++iter;
                ++count;
            } else if ((*iter & 240) == 192 || (*iter & 240) == 208) {      //1100 0000 или 1101 0000
                ++iter;
                ++count;
            } else {
                ++count;
            }
        }
    }
    std::cout << count;
}