#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <stdio.h>
#include <cstring>
#include <queue>
#include <stack>
#include <functional>
using namespace std;
#define Would
#define you


int main() {
	int n;
	cin >> n;
	int mon = n / 10 * 6;
	cout << 10 + mon / 60 << ":";
	if (mon % 60 < 10) { cout << "0"; }
	cout << mon % 60 << endl;
}