#include <iostream>
#include <vector>
#include <algorithm>
#include <iterator>
#include <array>
#include <map>
#include <stack>
#include <queue>
#include <set>

using namespace std;

int main() {


    int a;
    cin >> a;

    auto b = ((int) ((a / 100.0) * 10) * 6);

    int h = b / 60;
    int m = b % 60;

    int c = 10;

    c += h;

    printf("%d:%02d", c, m);

    return 0;
}