#include <iostream>
#include <iomanip>
using namespace std;
class Time
{
public:
    void setTime();
	void showTime();
	int hour, minute, sec;
};

void Time::setTime()          
{   cin>>hour>>minute>>sec;   }

void Time::showTime()         
{   
    if(hour>24||minute>60||sec>60)
    {
        cout<<"input error, plz input again";
        return;
    }
    cout << setw(2) << right << setfill('0') << hour<<":";
    cout << setw(2) << right << setfill('0') << minute<<":";
    cout << setw(2) << right << setfill('0') << sec;
}	

int main()
{   Time t;
    t.setTime(); 
    t.showTime(); 
    return 0; 
}