#include <iostream>
using namespace std;
                                                                                                
  
int main(){


    int a, t, m;


    cin >> a;

    t = a / 100;

    m = ( a % 100 ) * 6 / 10;
                                            

    if( m < 10 ) cout << 10 + t << ":" << "0" << m << endl;

    else cout << 10 + t << ":" << m << endl;


    return 0;

}