2.3

#include<iostream>
using namespace std;
class Time{
private:
int hour;
int minute;
int sec;
public:
void in();
void out();
};
Time t1;
void Time::in(){
cin>>t1.hour;
cin>>t1.minute;
cin>>t1.sec;
}
void Time::out(){
cout<<t1.hour<<":"<<t1.minute<<":"<<t1.sec<<endl;
}
int main()
{


  t1.in();
  t1.out();


return 0;
}