#include <bits/stdc++.h>
using namespace std;
int main(){
  int a;
  cin >> a;
  int h = 10 + a / 100;
  int m = a % 100 / 10 * 6;
  if (m < 10){
    cout << h << ':' << '0' << m << endl;
  } else {
    cout << h << ':' << m << endl;
  }
}