#include <iostream>
#include <string>
#include <math.h>
#include <vector>
#include<stdio.h>
#include<algorithm>
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n)  FOR(i,0,n)
#define all(x) (x).begin(),(x).end()
typedef long long ll;
#define SZ(x) ((int)(x).size())

using namespace std;

int main(){
	int a;
	int h, m;
	cin >> a;
	h = a / 100;
	m = (a - h * 100) * 60 / 100;
	if (m < 10) {
		cout << h + 10 << ":0" << m << endl;
	}
	else {
		cout << h + 10 << ":" << m << endl;
	}
	return 0;
}