#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define REP(i, n) rep(i, 0, n)
#define repb(i, a, b) for(int i = a; i >= b; i--)
#define all(a) a.begin(), a.end()
// #define int long long
#define chmax(x, y) x = max(x, y)
#define chmin(x, y) x = min(x, y)
using namespace std;
typedef pair<int, int> P;
const int mod = 1000000007;
// const int INF = 1e12;

signed main(){
    int a;
    cin >> a;
    int h = 10, m = 0;
    m += a / 10 * 6;
    h += m / 60;
    m %= 60;
    printf("%02d:%02d\n", h, m);
}