#include <iostream>
#include <string>
#include <vector>

int main() {
    std::string input;
    std::getline(std::cin, input);

    std::vector<std::string> words;
    std::string word = "";
    for (char c : input) {
        if (c == ' ') {
            if (!word.empty()) {
                words.push_back(word);
                word = "";
            }
        } else {
            word += c;
        }
    }
    if (!word.empty()) {
        words.push_back(word);
    }

    int count = 0;
    for (const std::string& w : words) {
        if (w.front() == w.back()) {
            count++;
        }
    }

    std::cout << "Number of words that start and end with the same letter: " << count << std::endl;

    return 0;
}