#include <bits/stdc++.h>
using namespace std;

int main()
{
	int a;
	cin >> a;

	int h = a / 100 + 10;
	int m = (a % 100) * 60 / 100;

	char ans[16];
	sprintf( ans, "%02d:%02d", h, m );

	cout << ans << endl;
}