#include <iostream>
using namespace std;

class Clock {
  int hr, min, sec;
 public:
  void set( int h, int m, int s )
    { hr = h; min = m;  sec = s; }
  void display()
    { cout << hr << ':' << min << ':' << sec ; }
};

int main ()
{    Clock c;
 c.set(11,59,59);  c.display();
 return 0;
}