#include <iostream>
#include <cstring>

using namespace std;

struct stack{
    int top;
    string name;
};

stack arrName;

void Push(string name){
    for (int i=0;i<name.length();i++){
        arrName.top++;
        arrName.name[arrName.top] = name[i];
    }
}

void ReverseString(){
    for (int i = arrName.top; i>=0; i--){
        cout << arrName.name[i];
    }
    cout << endl;
}

int main(int argc, char **argv){
    if (argc == 1 || argc > 2){
        cout << "Penggunaan: balik [kalimat yang diapit tanda petik]\n";
        cout << "Contoh: balik \"Saya merasa sedang beruntung\"\n";
    } else {
        Push(argv[1]);
        cout << "Kalimat terbalik: ";
        ReverseString();
    }
return 0;
}