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

int main(int argc, char const* argv[])
{
    int a;
    cin>>a;
    int h,m;
    h = 10;
    int h1 = a/100;
    m = (a%100)*6/10;
    int h2 = h+h1;

    cout<<h2<<":"<<m<<endl;
    return 0;
}