#include <iostream>

using namespace std;

int main()
{

    int a;
    cin >> a;

    int h, m;

   

    h = (10 + (a / 100))%24;

    m = (a % 100) * 60 / 100;

    if (m < 10)
    {
     cout << h << ":0" << m << endl;
    }
    else
    {
        cout << h << ":" << m << endl;
    }

   

    return 0;
}