#include <iostream>
#include <string>

// Class to analyze letter statistics in a string
class letter_stats {
private:
    char letter1, letter2;  // Two character variables
    std::string text;       // String variable

public:
    // Constructor to initialize private variables
    letter_stats(char l1, char l2, std::string str) : letter1(l1), letter2(l2), text(str) {}

    // Function that prints the values of private variables
    void print_word() const {
        std::cout << "Letter 1: " << letter1 << "\n";
        std::cout << "Letter 2: " << letter2 << "\n";
        std::cout << "Text: " << text << "\n";
    }

    // Function to check if a letter exists in the string
    bool letter_exists(int index) const {
        char selected_letter;
        if (index == 1) {
            selected_letter = letter1;
        } else {
            selected_letter = letter2;
        } // Select appropriate letter
        return text.find(selected_letter) != std::string::npos; // Check if letter is in string
    }

    // Function to find the last occurrence of a letter in the string
    int letter_index(int index) {
        char selected_letter;
        if (index == 1) {
            selected_letter = letter1;
        } else {
            selected_letter = letter2;
        } // Select appropriate letter
        return text.rfind(selected_letter); // Find last occurrence
    }
};

int main() {
    char l1, l2;
    std::string user_text;
    
    // Getting user input for letters and text
    std::cout << "Enter the first letter: ";
    std::cin >> l1;
    std::cout << "Enter the second letter: ";
    std::cin >> l2;
    std::cout << "Enter a sequence of characters (no spaces): ";
    std::cin >> user_text;
    
    // Creating an object of letter_stats class
    letter_stats stats(l1, l2, user_text);
    
    // Display stored values
    stats.print_word();
    
    // Check and print if the letters exist in the string
    for (int i = 1; i <= 2; ++i) {
        if (stats.letter_exists(i)) {
            std::cout << "Letter " << (([&]() { if (i == 1) return l1; else return l2; }())) << " found in the string.\n";
        } else {
            std::cout << "Letter " << (([&]() { if (i == 1) return l1; else return l2; }())) << " not found in the string.\n";
        }
    }
    
    // Print the last index of each letter
    for (int i = 1; i <= 2; ++i) {
        int index = stats.letter_index(i);
        if (index != -1) {
            std::cout << "Last occurrence of letter " << (([&]() { if (i == 1) return l1; else return l2; }())) << " is at index " << index << "\n";
        } else {
            std::cout << "Letter " << (([&]() { if (i == 1) return l1; else return l2; }())) << " not found in the string.\n";
        }
    }
    
    return 0;
}