#include<iostream.h>
#include<conio.h>
#include<Windows.h>
//using namespace std;
struct time{
	 int hr,min,sec;
};
int main()
{
	 time a;
	 a.hr = 0;
	 a.min = 0;
	 a.sec = 0;
	 for(int i = 0; i<24; i++)
	 {
		  if(a.hr == 23)
		  {
				a.hr = 0;
		  }
		  for(int j = 0; j<60; j++)
		  {
				if(a.min == 59)
				{
					 a.min = 0;
				}
				for(int k = 0; k<60; k++)
				{
					 if(a.sec == 59)
					 {
						  a.sec = 0;
					 }
					 cout<<a.hr<<" : "<<a.min<<" : "<<a.sec<<endl;
					 a.sec++;
					 //sleep(1000);
					 clrscr();
				}
		  a.min++;
	 }
		  a.hr++;
	 }
}