#include <bits/stdc++.h>

using namespace std;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int a;
    int min;
    int h;
    cin >> a;
    min = a/10*6;
    h = min / 60;
    min %= 60;

    if (min < 10) cout << h+10 << ":0" << min << endl;
    else cout << h+10 << ':' << min << endl;

    return 0;

}