#include <iostream>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <algorithm>
#include <string>
#include <sstream>
#include <complex>
#include <vector>
#include <list>
#include <queue>
#include <deque>
#include <stack>
#include <map>
#include <set>
#include <fstream>

using namespace std;

typedef long long unsigned int ll;

#define rep(i,n)for(i=0;i<n;i++)
#define FOR(i,a,n) for(i=a;i<n;i++)
#define ALL(s)s.begin(), s.end()

#define INF (1e9)
#define PI  (acos(-1))




int main()
{
	int a;
	cin >> a;
	int h = 10, m = 0;
	h += a / 100;
	m += (a % 100) / 10 * 6;

	printf("%02d:%02d\n", h, m);
	return 0;


}