#include <iostream>
#include <vector>

using namespace std;

string command, new_Word;

class Validator {
private:
    vector< string > words = {"hello", "hi", "goodbye", "greetings"};
public:
    int add_word(string word) {
        this -> words.push_back(word);
        return 1;
    }
    int check_word(string word) {
        for (int i = 0; i < words.size(); i++) {
            if (word == words[i]) return 1;
        }
        return 0;
    }
    string get_Word(int i) {
        return words[i];
    }
    int len_Dict() {
        return words.size();
    }
};

int main() {
    while (1) {
        Validator Validate;
        cout << "Please type 'add' if you want to add words into the dictionary and type 'check' for the words you want to check and 'get' for all current words" << endl;
        cin >> command;
        if (command != "get") {
            cin >> new_Word;
        }
        if (command == "add") {
            Validate.add_word(new_Word);
            cout << "Your word: " << new_Word << " has been added successfully" << endl;
        }
        else if (command == "check") {
            if (Validate.check_word(new_Word)) cout << "Your word is correct" << endl;
            else cout << "Your word is incorrect" << endl;
        }
        else if (command == "get") {
            for (int i = 0; i < Validate.len_Dict(); i++) {
                cout << Validate.get_Word(i) << endl;
            }
        }
        else cout << "Your command is not recognized" << endl;

    }
}