#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <string>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <stdio.h>
using namespace std;
#define int long long
int MOD = 1000000007;
signed main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	int N;
	cin >> N;
	int a, b;
	a = 10;
	a += N / 100;
	b = 6 * (N % 100) / 10;

	cout << a << ":";
	if (b < 10)cout << '0';
	cout << b << endl;
}