// A class of times -- OOP

#include <iostream>
using namespace std;

class Time
{
public:
    void read(istream& in = cin)
    {
        in >> hours;
        in.get(); // colon
        in >> minutes;
    }

    void print(ostream& out = cout)
    {
        out << hours << ':';
        if (minutes < 10) {
            out << 0;
        }
        out << minutes;
    }

    bool less_than(const Time& t)
    {
//        return (hours * 60 + minutes) < (t.hours * 60 + t.minutes);

        return (hours < t.hours) ||
                   (hours == t.hours && minutes < t.minutes);
    }

private:
    int hours;
    int minutes;
};

// Test driver for Time
int main()
{
    Time t;

    t.read();
    t.print();
    cout << endl;

    Time t2;
    t2.read(cin);
    if (t.less_than(t2)) {
        cout << "The first time occurs before the second one.\n";
    }
    else {
        cout << "The first time does not occur before the second one.\n";
    }

    return 0;
}