#include <iostream>
#include <fstream>
#include <iomanip>
#include <cmath>
#include <string>

using namespace std;

class time
{
private:

    long long Hou, Min, Sec;
    long long Allsec;

public:

    time( ){ Hou = 0, Min = 0, Sec = 0, Allsec = 0; }

    void getData()
    {
        cin >> Hou >> Min >> Sec;
    }

    int getAllsec()
    {
        Allsec = Hou*3600+Min*60+Sec;
        return Allsec;
    }

    ~time(){};

};

int main()
{
    time t;

    int H, M, S, temp;
    int NumN;
    cin >> NumN;

    t.getData();

    temp = t.getAllsec();

    for( int i=0; i<NumN; i++ )
    {

        temp = temp / 3;

        H = temp/3600;
        M = (temp%3600)/60;
        S = (temp%3600)%60;

        cout << setfill('0') << setw(2) << H << ":";
        cout << setfill('0') << setw(2) << M << ":";
        cout << setfill('0') << setw(2) << S << endl;
    }

    return 0;
}