#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <typeinfo>

using namespace std;

class Word {
private:
    int length;
    string word;
public:
    Word()
    {
        length = 0;
        word = "";
    }

    Word(int length, string word)
    {
        this->length = length;
        this->word = word;
    }

    Word(const Word& obj)
    {
        this->length = obj.length;
        this->word = obj.word;
    }

    bool checkFL(){
        if(this->word[0] ==  this->word[this->length-1]){
             return true;
        }else{
            return false;
        }
    }

    bool check3k(){
        int count = 0;
        for (int i = 0; i < this->length; i++) {
            if(this->word[i] == 'k'){
                count++;
            }
        }
        if(count == 3){
            return true;
        }else{
            return false;
        }
    }

};



int main(int argc, const char * argv[]) {
    string value = "Hello how are you hah kknjnk";
    istringstream iss;
    iss.str(value);
    for (int i = 0; i < value.size(); i++) {
        string val;
        iss >> val;
        Word word((int)val.size(), val);\

        if(word.checkFL()){
            cout << val <<endl;
        }

        if(word.check3k()){
            cout << val <<endl;
        }
    }
    return 0;
}